Global health physician-epidemiologist
Protecting themedicines thatprotect us.
Antimicrobial resistance and emerging infections are unfolding in our hospitals, farms and neighbourhoodsa. I work across medicine, epidemiology and social science to understand how these threats evolve, and to turn that understanding into action.
The research map
22 projects placed from the individual to the planet, across three stages. Select a project to explore its connections.
About
My questions come from
three places: the bedside, the
field site and the policy table.
I trained and practised as a clinician in Kolkata, first in critical care and anaesthesiology, then in preventive and community medicine. Fieldwork has since taken me across India: antibiotic use among caregivers and smallholder dairy farmers in rural West Bengalb, enteric fever and cholera surveillance, water and sanitation exposure in urban slums, and zoonotic risk where people, animals and cities meet.
policy
As a scientist at ICMR-NICED in Kolkata I co-led a phase IV rotavirus vaccine trialc whose evidence supported national scale-up. During COVID-19 I ran the secretariat of India’s National Task Forced at ICMR, contributing rapid evidence synthesis, the PLACID trial and the first national serosurvey. Earlier, I drafted background evidence for India’s National Action Plan on AMR and built evaluation instruments now used across WHO SEARO.
- 2025
- PhD, International Health, Epidemiology, Johns Hopkins Bloomberg School of Public Healthe
- 2019
- DTM&H, Royal College of Physicians, London
- 2015
- MD, Community Medicine, University College of Medical Sciences, New Delhi
- 2010
- MBBS, Medical College and Hospitals, Kolkata
Research
Research, from measuring a
problem to scaling a solution
My projects fall into three stages. Most of the work starts with measurement in the field, and the best of it ends in policy.
Define the Problem
Measuring burden, exposure and vulnerability: enteric fever and cholera surveillance, zoonoses priority setting, antibiotic use in rural households, and the health of marginalised urban populations.
Develop & Test Solutions
Randomised trials and epidemiologic studies that test whether vaccines and treatments are safe, effective and workable, and explain why they work or fail.
M&E + Scale Up
How interventions are adopted, evaluated and scaled in real health systems, and how evidence reaches national and regional policy.
Selected work
Doctoral research
Antimicrobial use and interventions in rural India
A mixed-methods dissertation in three strands: how caregivers seek care and use antibiotics for children; how smallholder farmers access and decide on antibiotics for livestock; and how far rotavirus vaccination reduces antibiotic-treated diarrhoeaf.
Phase IV trial
RVICS, the rotavirus vaccine interchangeability trial
A multicentre, open-label, randomised controlled non-inferiority trial testing whether Rotavac and Rotasiil could be given in an interchangeable schedule. The evidence supported national scale-up of India’s rotavirus programme and was published in The Lancet Infectious Diseases.
PLACID: convalescent plasma in COVID-19
Phase II open-label randomised trial in moderate COVID-19; findings shaped national case-management policy. Co-investigator, ICMR.
National Surveillance System for Enteric Fever
Multisite surveillance to estimate India’s true enteric fever burden and guide typhoid vaccine policy.
AMR situation-analysis tools for WHO
A surveillance-assessment instrument used across SEARO member states, and the India review that fed the National Action Plan on AMR.
Peri-urban human–animal–environment interface
A national One Health research programme on disease risk where livestock, people and cities meet.
Dissertation assistant
Ask my dissertation a question
An assistant restricted to two sources: my dissertation and its analytic memos. It reproduces quantitative results exactly, cites the section, and does not speculate or browse the web.
Open the assistantSTOP AMR
Protecting antibiotics is not only
a scientific goal. It is a moral one.
STOP AMR is a 501(c)(3) nonprofit I founded in 2024. It works with communities to reduce the harm of antimicrobial resistance through education, advocacy and locally owned action.
Visit stopamr.orgSelected publications
Teaching and policy
Evidence is only useful
once it is taught and used.
Courses and modules
Undergraduate epidemiology, biostatistics, global health and public health at the University of Oklahoma. Also an examiner and paper-setter for the DTM&H.
Briefs and instruments
India’s National Action Plan on AMR, NTAGI vaccine recommendations, and WHO South-East Asia evaluation tools.