Dr Clarence Tam


Associate Professor

I hold MSc and PhD degrees in Epidemiology from the London School of Hygiene & Tropical Medicine. I was Clinical Scientist (Epidemiology) at Public Health England (formerly the Health Protection Agency) before moving full-time to LSHTM in 2006. Currently, I hold parallel appointments at LSHTM and the Saw Swee Hock School of Public Health, National University of Singapore. I am Editor-in-Chief of Emerging Themes in Epidemiology, an Open Access epidemiology journal published by Biomed Central.


Department of Infectious Disease Epidemiology
Faculty of Epidemiology and Population Health


Vaccine Centre


I currently teach on Vaccinology for Clinical and Public Health Practice, a short course run jointly by LSHTM and the National University of Singapore.


My research group currently focuses on the epidemiology and transmission of a range of infectious diseases using classical, molecular and social network approaches. Our work includes studies to understand the network of food supply to hawker centres in Singapore; use of electronic health records to understand the relationship between in-hospital patient movements and risk of MRSA colonisation; measure transmissibility of MRSA in households; measure the burden and aetiology of influenza and other respiratory viruses in childcare centres; measuring high-resolution contact patterns in relation to influenza transmission in closed environments; assessing dengue burden and transmissibility; understanding public perception of vaccines and antimicrobial resistance.  

To learn more about our current projects, see

Follow us on twitter @nus_sling, or

Research Area
Child health
Clinical databases
Economic evaluation
Public health
Disease control
Electronic health records
Vector control
Disease and Health Conditions
Diarrhoeal diseases
Infectious disease
Emerging Infectious Disease
Hospital acquired infection
Vector borne disease
Zoonotic disease
United Kingdom
Sri Lanka
East Asia & Pacific (all income levels)
Euro area

Selected Publications

Modelling study to estimate the health burden of foodborne diseases: cases, general practice consultations and hospitalisations in the UK, 2009.
O'Brien, S.J. ; Larose, T.L. ; Adak, G.K. ; Evans, M.R. ; Tam, C.C. ; Foodborne Disease Attribution Study Group, . ; COLLABORATORS;Cook, P. ; Cowden, J.M. ; Jackson, K.A. ; Smyth, B. ;
BMJ Open
Characteristics of acute febrile illness and determinants of illness recovery among adults presenting to Singapore primary care clinics.
Tun, Z.M. ; Moorthy, M. ; Linster, M. ; Su, Y.C. ; Coker, R.J. ; Ooi, E.E. ; Low, J.G. ; Smith, G.J. ; Tam, C.C. ;
BMC Infect Dis
Burden of Dengue Infection and Disease in a Pediatric Cohort in Urban Sri Lanka.
Tissera, H.; Amarasinghe, A.; De Silva, A.D.; Kariyawasam, P.; Corbett, K.S.; Katzelnick, L.; Tam, C.; Letson, G.W.; Margolis, H.S.; de Silva, A.M.;
Am J Trop Med Hyg
Estimates of dengue force of infection in children in colombo, sri lanka.
Tam, C.C. ; Tissera, H. ; de Silva, A.M. ; De Silva, A.D. ; Margolis, H.S. ; Amarasinge, A. ;
PLoS Negl Trop Dis
Changes in Causes of Acute Gastroenteritis in the United Kingdom Over 15 Years: Microbiologic Findings From 2 Prospective, Population-based Studies of Infectious Intestinal Disease.
Tam, C.C.; O'Brien, S.J.; Tompkins, D.S.; Bolton, F.J.; Berry, L.; Dodds, J.; Choudhury, D.; Halstead, F.; Iturriza-Gómara, M.; Mather, K.; Rait, G.; Ridge, A.; Rodrigues, L.C.; Wain, J.; Wood, B.; Gray, J.J.; IID2 Study Executive Committee, .;
Clin Infect Dis
Longitudinal study of infectious intestinal disease in the UK (IID2 study): incidence in the community and presenting to general practice.
Tam, C.C.; Rodrigues, L.C.; Viviani, L.; Dodds, J.P.; Evans, M.R.; Hunter, P.R.; Gray, J.J.; Letley, L.H.; Rait, G.; Tompkins, D.S.; O'Brien, S.J.; On behalf of the IID2 Study Executive Committee, .;
See all Dr Clarence Tam's Publications