Sunday, August 10, 2025

Community Medicine ProJR

 

August 10, 2025

Community Medicine ProJR and Participatory Medical Cognition:
Web 0.0-1.0 voluntary organisation driven healthcare learning insights from a Professor of community medicine.

SUMMARY:

Since 1970, the study of voluntary organizations has become an increasingly active arena for scholarly research.
In this chapter we focus on  a potential product of "competency based education" where the doctor not only builds his own competence but helps to build the competence of his community medicine patients.
Web 1.0 post from Web 0.0 anecdotes shared by the Professor of community medicine while traveling together in the bus: 
Showed this article:  around "Organizedhelponomics" to the Professor of community medicine sitting next to me in the bus and he related and added his own fascinating story. 
He topped the Andhra medical entrance in 1976 and completed his internship in 1983 March with 10 days extension due to his marriage and then inspite of getting MD general medicine, chose MD community medicine (as per wishes of the Sangha and against the wishes of his father). 
During MBBS he was deeply involved and guided by the principles of volunteerism that drove "Organizedhelponomics" even at that time when it didn't have any name. He would volunteer to help and learn around different patients that nowadays would now be labeled as "patient centered requirements driven learning" and from then his journey has been to learn everyday around rural patient requirements. 
Organizedhelponomics had made it clear to him that Christian missionaries could reach out to even the most ferocious man eating Tribals not because of the Bible but  because of their proficiency in healthcare and hence after his MD he refused a faculty position and instead went to naxal driven district of Adilabad  and regularly cycled to 50 villages under his PHC and this is when he saw firsthand Organizedhelpnomics in action where he would get his village patient's market produce to sell at higher rates by organization driven requests to keep a place in the bus reserved for their produce that could be marketed at a higher price in Hyderabad! And as predicted by the organisation, his proficiency in health care ensured that he never had any issues with the villagers and even the naxals.
After seeing the above post the following content was texted by the same Professor of community medicine as a speech focused on his learning community organization, prepared for a local gathering:
Respected elders, friends, and fellow members,
It is with immense gratitude that I reflect on the lessons I have learned from our organisation, lessons that have deeply influenced my life, both within my family and in society. The central value that stands out to me is the importance of character a guiding principle that has shaped my every action and decision.
One of the most profound teachings I have embraced is that "Work is Worship." This idea has been the cornerstone of my professional life, and I would like to share a few experiences that truly embody this value.
In 1989, while serving as a Health Officer in Bellampally, I found myself on a rainy day, umbrella in hand, closely monitoring sanitary activities. Despite the difficult conditions, I felt it was my responsibility to ensure the work was done properly. This incident had occurred nearly one to one and a half years earlier, and I had almost forgotten about it. However, the General Manager remembered it during my farewell when I was being transferred to Kothagudem. What made his appreciation significant was that, on the verge of retirement and in his long career, he had never seen a Health Officer of my position personally supervising such work, despite having two-tier supervisors below me. This acknowledgment reinforced my belief that I had learned from my "voluntary learning organisation" on how to worship our duty and treat every task, no matter how small, with the utmost seriousness. (ధ్యేయ నిష్ట)
Another occasion that highlighted the power of integrity was when I was serving as a District Immunization Officer (DIO). One of my immediate subordinates, due to a misunderstanding and the strict working conditions I had introduced, lodged corruption charges against me. Though the charges were unproven, it was a challenging time. During my farewell party when I was later transferred to Hyderabad, this same subordinate came to me in tears, confessing that his actions were a mistake. He expressed regret and acknowledged that despite his initial resistance to my work ethic, he had grown to respect it and had become more sincere and hardworking. This incident, shared by him during my farewell, taught me a valuable lesson from my childhood learning organisation—how best we can earn respect through our character, even in difficult circumstances. (సుశీలం జగద్యేన నమ్రం భవేత్)
In my academic career, another lesson has been of equal importance. There has not been a single year without an original paper publication, and I have consistently attended conferences and training sessions, both as a trainee and a trainer. This success reflects a key value I learned from my "national self-helpers)—how to groom and nurture students to achieve their highest potential.
I was also entrusted with organizing Mega Health Camps in all the slum areas of Hyderabad Metropolitan City as part of the Janmabhoomi program of the Combined Andhra Pradesh state. Around 50 teams were formed and allocated to different slum areas. I was responsible for all operational aspects, including staffing, diagnostics, medicines, transport, camp site arrangements, patient crowd management, and food distribution. This ability to plan meticulously and execute with precision was something I learned from the activities in my voluntarily learning organisation, where attention to detail and service are always paramount.
Finally, I would like to share an experience from my time as a committed doctor at a tribal PHC in Adilabad district. During the Sankranti festival holiday, my wife suggested that I stay home and enjoy the festival with our family. However, I decided to go to the PHC because no other doctor was available, and I knew my patients needed me. The PHC was 22 kilometers away, and by the time I arrived, I was 30 minutes late. There, I found a 13-year-old boy suffering from severe asthma. My staff reassured his family that the doctor would come, and luckily, I arrived just in time. At that time, we didn’t have nebulizers or inhalers; I had to treat the boy with an Aminophyllin drip. Thankfully, the boy recovered. From that day, my wife never stopped me from going to the PHC, even on holidays. This experience reinforced the value of commitment, and how serving others is the true essence of my role as a doctor—a lesson deeply ingrained in me through "national self-helpers."
In 2012 he was called by one of his organisation members that a helpless orphan woman lying naked on the road was having a huge ulcer with maggots Comin out of it and the local nursing home was charging a lot of money to amputate the leg! He immediately asked them not to go for amputation and wait for him to reach her and take a look at the wound. 
Here's some images of the wound and a video of him cleaning the wound by removing the maggots as well as other dead tissue: 
Furthermore, during the Covid pandemic, my commitment was tested yet again. I had the privilege of serving as the Incharge of a Covid healthcare hospital run by SEVA BHARATI at RVK, Annagiguda. In one emergency situation, without even wearing a mask, I entered the Covid inpatient ward to respond to an urgent call. This act further solidified the lesson I had learned from national self-helpers—how selfless service and dedication are the ultimate expressions of our professional commitment.
These experiences underscore how character, dedication, and commitment to one’s duty not only lead to personal satisfaction but also positively impact the people we work with, shaping their growth and success.
At home, the same values have been my guiding light, helping me build a peaceful and satisfied family life. In society, too, these principles have encouraged me to contribute meaningfully, fostering sincerity and unity in my surroundings.
The lessons from our organisation are not just ideals; they are tools for leading a life of purpose, fulfilment, and integrity.
References:




My request to Chat GPT:
Introduction to Community Medicine (concepts, scope, and relevance) As a community medicine specialist, I shall give an lecture as a speaker for “Kamineni Academy Of Medical Sciences & Research Centre, L.B.Nagar, Hyderabad Department of Community Medicine PG Refresher Course under IAPSM President’s Action Plan 2025-26 Date - 18 to 21 Feb 2026 Venue - Indira Auditorium, KHL, L.B.Nagar Schedule – Day 1 18-02-2026” Give your ideas
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Chat GPT Response:
Below is a time-tested, academically sound framework for your Day-1 keynote lecture on
“Introduction to Community Medicine – Concepts, Scope, and Relevance”, suited for a PG Refresher Course, rooted in classical principles while aligning with present needs.
______________
1. Opening the Lecture (5–7 minutes)
Purpose: Set the philosophical and historical tone
Suggested approach
Begin with the origin of Community Medicine from:
o Hygiene → Preventive Medicine → Social & Preventive Medicine → Community Medicine
Emphasize that Community Medicine is not an auxiliary subject, but the foundation of medicine, as medicine was born in the community long before hospitals existed.
Key message to PGs
“Clinical medicine treats disease in an individual; Community Medicine prevents disease in populations.”
______________
2. Core Concept of Community Medicine (10 minutes)
a) Definition (Classical + Applied)
Explain Community Medicine as:
A science and art
Concerned with promotion, prevention, protection, and prolongation of life
Using organized community efforts
You may contrast:
Clinical focus → Individual, curative, episodic
Community focus → Population, preventive, continuous
b) Central Concepts to Highlight
Population at risk
Natural history of disease
Levels of prevention
Epidemiological triad
Equity, accessibility, affordability
Reinforce that Community Medicine is the linking bridge between medicine and society.
______________
3. Scope of Community Medicine (15 minutes)
This is the heart of the lecture for PGs.
a) Academic Scope
Epidemiology
Biostatistics
Research methodology
Demography
Health systems & health economics
b) Service Scope
National Health Programmes
Primary Health Care
Maternal & Child Health
Communicable & Non-communicable diseases
Environmental & Occupational Health
c) Administrative Scope
Health planning
Health management
Monitoring & evaluation
Leadership in public health institutions
d) Emerging Scope (Brief but impactful)
Digital health & HMIS
AI as a tool (not replacement)
Evidence-based policymaking
Disaster preparedness & One Health
Stress that Community Medicine specialist is simultaneously a clinician, epidemiologist, administrator, teacher, and researcher.
______________
4. Relevance of Community Medicine Today (10 minutes)
Link relevance to current realities:
Epidemiological transition
Rising NCDs
Pandemics (without naming too much, keep dignified)
Health inequities
Resource constraints in India
Explain:
Why no health system can survive on curative care alone
Why Community Medicine is the backbone of Universal Health Coverage
A strong line you may use:
“Hospitals save lives; Community Medicine saves societies.”
______________
5. Role of a Postgraduate Student in Community Medicine (5–7 minutes)
Speak directly to PGs:
As future teachers
As programme managers
As researchers
As policy influencers
Clarify expectations:
Not merely passing exams
But developing public health vision and ethical responsibility
______________
6. Concluding Message (3–5 minutes)
End on a value-based note:
Community Medicine is rooted in service, responsibility, and foresight
It aligns with Indian ethos of “Sarve Santu Niramayah”
Final takeaway:
“A Community Medicine specialist does not wait for disease to appear — he works so that disease never appears.”
______________
Optional Add-ons (if time permits)
One real field example (PHC / outbreak / programme success)
One reflective question to PGs:
o “If tomorrow all hospitals close, what will protect the community?”
______________
If you wish, I can:
Convert this into a 45-minute PPT structure (slide-wise headings)
Add exam-oriented framing for PG understanding
Provide 2–3 powerful quotations for opening & closing slides
Just tell me how you would like to proceed.
================================================
My request to Chat GPT: 
I want to start with my own public health experience. 1) while I was tribal PHC medical officer, I used to visit villages by travelling to villages by cycling. I came to know that tribals are using unsterilised stones to crush the umbilical cord. I convinced them to clean and sterilize the stones by boiling. Which then can easily accept to adopt to this behaviour change. I first convinced the village priests. It drastically reduced the infections - neonatal fever. (Hygiene importance) Here I want to add the great sanitary awakening of west and drastic improvement of their quality of life and elimination of majority of communicable diseases before invention of antibiotics 2) While I was working as district immunization officer, I understood by collecting data of last few years, about the child mortality due to diarrhoea and dehydration about 200 children below six year “Anganwadi data “. When ORS is there we should not have this much of mortality. I was not bothered much about diaspora incidence but about dehydration deaths that too 99% preventable. I designed, ORS compain specifically designed for my district (Adilabad). I focused on once again tribal priests and village leaders who are opinion leaders. After implementing the program, the deaths drastically cam down to single digit. I add some more
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Chat GPT Response:
Your instinct to begin with lived public-health experience is absolutely correct. This is how Community Medicine has traditionally been taught—from the field to theory, not from slides to slogans. Below is a refined, lecture-ready narrative structure, with your two experiences placed as foundational case studies, and seamlessly linked to classical public-health principles and global history.
______________
Opening the Lecture: “Community Medicine is Learnt in the Field”
You may begin quietly, without slides, almost conversationally:
“Before I speak about concepts and definitions, I want to tell you how Community Medicine taught me.”
This immediately establishes credibility, humility, and attention.
______________
Experience 1: Tribal PHC Medical Officer – Hygiene as the First Public Health Revolution
Field Narrative (Storytelling – 5 minutes)
As a Medical Officer in a Tribal PHC, villages were scattered, inaccessible.
Reaching villages by bicycle, not vehicle — symbolizing proximity to the community.
Observation:
o Umbilical cords crushed with  unsterilised stones
o High incidence of neonatal fever and sepsis
Constraint:
o No immediate technology
o No antibiotics at the point of delivery
Intervention (Core Community Medicine Principle)
You did not impose modern tools
You modified an existing cultural practice
o Same stone
o But cleaned and sterilised by boiling
Entry point:
o Village priests – the real custodians of belief
Result:
o Drastic reduction in neonatal infections
o Sustainable behaviour change
Teaching Point to PGs
Emphasize clearly:
This is Primary Prevention
This is Health Education
This is Cultural Sensitivity
This is Community Participation
“I did not change their tradition. I purified it.”
______________
Linking to Western Sanitary Awakening (Conceptual Bridge)
Now connect globally:
In the 19th century, the West eliminated:
o Cholera
o Typhoid
o Puerperal sepsis
Before antibiotics existed
Through:
o Clean water
o Sewage disposal
o Hand hygiene
o Safe delivery practices
Key message:
“Hygiene saved Europe before antibiotics were invented. Hygiene saved my tribal villages too.”
This reinforces the universality of public health laws.
______________
Experience 2: District Immunization Officer – Data as a Tool for Life Saving
Field Reality (5 minutes)
While serving as District Immunization Officer, Adilabad
You reviewed Anganwadi records over several years
Observation:
o ~200 deaths in under-six children
o Cause: Diarrhoea & dehydration
Crucial insight:
o ORS was available
o Yet deaths continued
Ethical Shift in Thinking
You may say:
“I was not disturbed by diarrhoea incidence. I was disturbed by dehydration deaths — because 99% of them are preventable.”
This line will deeply impact PGs.
______________
Intervention Strategy (Classic Community Medicine)
Evidence-based decision:
o Problem identification using routine data
Intervention:
o District-specific ORS campaign
Strategy:
o Not posters alone
o Focus on:
Tribal priests
Village leaders
Opinion makers
Emphasis:
o ORS as life-saving medicine, not packet
Outcome
Mortality reduced:
o From ~200
o To single digits
______________
Teaching Points to PGs
Explicitly list:
Surveillance & data analysis
Program planning
Community ownership
Preventive ethics
Cost-effective intervention
“This is Community Medicine — saving hundreds of children without a single ICU bed.”
______________
How to Integrate These into Your Lecture Structure
After these two narratives, you smoothly transition:
“Now that you have seen Community Medicine in action, let us understand its concepts, scope, and relevance.”
From here, definitions and theory make sense, not memorization.
______________
Optional Third Add-on (If You Wish to Add One More)
You may add briefly:
Any outbreak investigation
Maternal death audit
Immunization gap correction
Environmental health issue
Even one slide / one story is enough.
______________
Closing Line (Strong & Traditional)
You may conclude the introduction with:
“Community Medicine is not practised in air-conditioned halls.
It is practised in villages, records, beliefs, and human behaviour.”
______________
If you want, next I can:
Convert this into opening 6–8 PPT slides
Rewrite this into first-person lecture script
Align these examples with exam-oriented keywords for PGs
Just tell me how you would like to proceed.
================================================
My request to Chat GPT: 
I have not completed by experience and topics in my mind. 1. 1st experience as a PHC medical officer and personal home visit. Identifying the behavioural aspects of midwifery services by treditional dais. 2. As a district officer, using the data to formulate district specific ORS campaign. ===== 3. Public health Programme development: Adilabad was usually use to stand last performer among all the districts of combined Andhra Pradesh. A newly introduced PPI program against Polio was introduced in the year 1995. I have meticulously planned from vaccine booths locations, ice Supply chain in a day three times from ice depot points. Rout maps were developed. Emergency medical teams, vaccine supply mechanism etc. In those days there were no mobile phones hens police HAM net work is planed like. Job charts for each and every person worked from bottom to top is prepared so as to there won’t be any confusion in role of each persons activity. MIS is developed so that by the end of the day total activity data shall reach district headquarters. There were no fax facilities at pHC / mandal level hence getting the data is also difficult.
Unutilised vaccines also collected back by maintaining the cold system very tightly. Remember there was no VVM on vails in those days. Our district stood 2nd in the state of 23 districts. I received jan 26th appreciation award from Govt of AP. Community medicine contributes to preparing or designing the public Programme 4. Epidemic investigation, I was asked to investigate the diarrhoea outbreak at Pithapuram of east godavari district. Many specialists not understood the disease death toll is not came down. I went and analysed the reason being is due to chemical pollution by effluent releasing by a Factory. The nearby villagers use to consume fishes from a stream / canal. The fishes are abundant among them many not able to escape easily. Those who are consuming got the attack. 5) Covid is the one of the greatest aspect of advising govt to go for complete- strict implementation of lockdown. This has stopped the spread of disease. Vaccine distribution to very nuke&corners of India in a very short time. This is the continuation. ====== A superior specialist can same 1000 patients for his lifetime. But a public health professional can same thousands of people in a month or year. ======== Basing on these 5 experiences designe a preservation by addressing the “Introduction to Community Medicine – Concepts, Scope, and Relevance” topic
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Chat GPT Response:
Excellent. You now have five classic, field-tested public health experiences that naturally map onto the Concepts, Scope, and Relevance of Community Medicine.
Below is a well-structured presentation design, suitable for a Day-1 keynote / inaugural academic lecture, grounded in tradition, experience, and public health wisdom.
I will not dilute your experiences; instead, I will elevate them into teaching pillars.
______________
INTRODUCTION TO COMMUNITY MEDICINE
Concepts, Scope, and Relevance
(A Field-Based Perspective)
______________
Slide 1. Opening Slide
Title
Introduction to Community Medicine – Concepts, Scope, and Relevance
Subtitle
Lessons from the Field: From Villages to Policy
______________
Slide 2. How I Learnt Community Medicine
(No definitions yet)
Opening statement (verbatim or close):
“Community Medicine did not begin for me in classrooms or textbooks.
It began in villages, homes, registers, outbreaks, and programmes.”
Explain briefly:
Learning from people
Learning from data
Learning from systems
Learning from crises
______________
EXPERIENCE–BASED CORE (MAIN BODY)
______________
Slide 3. Experience 1
PHC Medical Officer – Home Visits & Midwifery Practices
Context
Tribal PHC Medical Officer
Personal home visits
Deliveries conducted by traditional dais
Observation
Unsafe midwifery practices
Behavioural and cultural determinants of neonatal health
Umbilical cord practices, hygiene gaps
Key Concept Introduced
Behavioural aspects of health
Social determinants
Cultural practices in health care
Teaching point:
“Disease does not begin in the body; it begins in behaviour.”
______________
Slide 4. Public Health Concept Derived
Hygiene as the First Prevention Tool
Identification of modifiable behaviour
Working with traditional dais, not against them
Trust-based communication
Result: reduction in neonatal infections
Concepts covered
Primary prevention
Health education
Community participation
Cultural competence
______________
Slide 5. Experience 2
District Officer – Data-Driven ORS Campaign
Situation
High under-six mortality due to diarrhoea
Anganwadi data revealed ~200 deaths
ORS availability ≠ ORS usage
Critical Insight
“I was not worried about diarrhoea incidence,
I was worried about dehydration deaths — because they are preventable.”
Action
District-specific ORS campaign (Adilabad)
Focus on opinion leaders:
o Tribal priests
o Village leaders
Outcome
Mortality reduced to single digits
______________
Slide 6. Conceptual Link
Epidemiology & Evidence-Based Action
Concepts taught
Use of routine data
Surveillance
Program planning
Cost-effective intervention
“Community Medicine converts data into decisions and decisions into lives saved.”
______________
Slide 7. Experience 3
Public Health Programme Development – PPI (1995)
Context
Adilabad: consistently low-performing district
Introduction of Pulse Polio Immunization
Planning Excellence
Booth micro-planning
Ice supply chain (3 times/day)
Route maps
Emergency medical teams
Police HAM network (no mobile phones)
Job charts for every level
MIS for same-day reporting
Vaccine retrieval with strict cold chain
No VVMs in that era
Outcome
District ranked 2nd in the state (out of 23)
Republic Day appreciation award – Govt. of AP
______________
Slide 8. Scope of Community Medicine
Programme Planning & Management
This single experience demonstrates:
Health planning
Logistics & cold chain
Leadership & coordination
Monitoring & evaluation
Accountability
“Community Medicine builds systems so that medicine reaches everyone.”
______________
Slide 9. Experience 4
Epidemic Investigation – Pithapuram Diarrhoea Outbreak
Problem
Persistent deaths
Clinical treatment not reducing mortality
Field Investigation
Environmental assessment
Identification of industrial effluent pollution
Consumption of contaminated fish from canal
Intervention
Stopping exposure source
Not merely treating cases
Learning
“Unless the source is removed, treatment alone cannot save lives.”
______________
Slide 10. Conceptual Mapping
Epidemiology & Environmental Health
Concepts demonstrated
Outbreak investigation
Environmental determinants
Intersectoral coordination
Preventive over curative approach
______________
Slide 11. Experience 5
COVID-19 – Public Health at National Scale
Role of Community Medicine
Advising strict lockdown implementation
Breaking transmission chains
Risk communication
Vaccine logistics to the remotest corners
Continuation of immunization principles at massive scale
Message
“Clinical medicine treated COVID patients.
Community Medicine protected the nation.”
______________
SYNTHESIS & RELEVANCE
______________
Slide 12. What Is Community Medicine? (Now the Definition)
After experiences, definitions now make sense:
Science and art of preventing disease
Prolonging life
Promoting health
Through organized community efforts
______________
Slide 13. Relevance Today
NCD epidemic
Pandemics
Health inequity
Resource limitations
Climate & environmental threats
“No country can afford curative-only medicine.”
______________
Slide 14. Final Comparative Statement
(Your powerful line refined)
“A superior specialist may save a thousand patients in a lifetime.
A public health professional can save thousands of lives in a month.”
______________
Slide 15. Closing Message to PGs
Community Medicine is responsibility, not convenience
It demands:
o Vision
o Patience
o Ethical courage
Final line
“If you want to treat disease, choose a speciality.
If you want to protect society, choose Community Medicine.”
______________
NEXT STEPS (If you want)
I can now:
Convert this into 15–18 PPT slides
Prepare a spoken lecture script
Add exam-oriented keywords
Condense into a 30-minute or 45-minute version
Tell me how you would like to proceed.
================================================
My request to Chat GPT: 

Better to add in Europe, before sanitary awakening, there were epidemics of communicable diseases. plague, Cholera etc. (Vector & Water Food borne Disease) They were controlled & Eliminated much ealier to the Antibiotic Invesions
================================================
Chat GPT Response:
That is a very important civilizational and scientific point, and it fits perfectly into your lecture as the historical proof of Community Medicine’s power.
Below is a refined integration, placed at the right pedagogic moment, without disturbing the flow of your five field experiences.
______________
Where to Insert This in Your Presentation
👉 Immediately after Experience–1 (Hygiene & Midwifery practices)
This makes the transition natural and powerful.
______________
New Slide (After Experience–1)
Europe Before the Sanitary Awakening
“History Proves Prevention Works”
Situation in Europe (Pre-19th Century)
Recurrent epidemics of communicable diseases
Major killers:
o Plague – vector-borne
o Cholera – water-borne
o Typhoid – food & water-borne
o Typhus – lice-borne
High infant and maternal mortality
Overcrowded cities
Open sewage systems
Contaminated water sources
“Hospitals existed, doctors existed — yet epidemics ruled.”
______________
Next Slide
The Great Sanitary Awakening of the West
What Changed?
Clean drinking water supply
Sewerage and drainage systems
Waste disposal
Food safety measures
Housing reforms
Personal and environmental hygiene
Crucial Truth
These measures were implemented much before the discovery of antibiotics.
No penicillin
No modern antimicrobials
Yet epidemics declined and disappeared
______________
Teaching Emphasis (One Powerful Slide)
Key Public Health Principle
“Communicable diseases were controlled and eliminated
not by medicines, but by sanitation.”
Link back to your field experience
Boiling stones in tribal villages
Clean water & sanitation in Europe
“The same public health laws operate everywhere —
in a tribal hamlet and in an industrial city.”
______________
xxxxxx Table.
______________
Bridge to Modern Community Medicine
You may then say:
“When antibiotics arrived, they supported public health.
They did not create it.”
This prepares the ground for:
ORS experience
Immunization planning
Epidemic investigation
COVID response
______________
Suggested One-Line Takeaway for Students
“Antibiotics treat infections; sanitation prevents epidemics.”
______________
How This Strengthens Your Lecture
✔ Gives historical legitimacy
✔ Counters the myth that medicine alone saves populations
✔ Aligns Indian field experience with global history
✔ Reinforces Concepts + Scope + Relevance
______________
If you wish, next I can:
Insert this formally into the final PPT slide sequence
Add one comparative diagram (Europe vs Tribal India)
Provide 2–3 exam-ready statements PGs can quote
Just tell me how you want to proceed.
Introduction to Community medicine pptx





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