Dr Viyaasan Mahalingasivam

Clin Res Fellow (NIHR Doctoral Fellow)

United Kingdom

I graduated from Barts and The London School of Medicine & Dentistry in 2010 and subsequently completed training in Nephrology and General Internal Medicine on the North Thames rotation in London. I undertook a Masters degree in Epidemiology at the London School of Hygiene & Tropical Medicine in 2017-19, and returned to commence an NIHR Doctoral Research Fellowship in 2021.


Department of Non-communicable Disease Epidemiology
Faculty of Epidemiology and Population Health


The focus of my research has been to use electronic health records to investigate long-term kidney outcomes after COVID-19 and the economic effects of the pandemic on kidney care. I primarily work on the OpenSAFELY platform, but have also had the opportunity to undertake complementary research in collaboration with the Stockholm CREAtinine Measurements (SCREAM) project based at Karolinska Institutet.

Research Area
Electronic health records
Health economics
Disease and Health Conditions
Kidney disease
United Kingdom

Selected Publications

Implementing Germ Defence digital behaviour change intervention via all primary care practices in England to reduce respiratory infections during the COVID-19 pandemic: an efficient cluster randomised controlled trial using the OpenSAFELY platform.
Ainsworth, B; Horwood, J; Walter, SR; Miller, S; Chalder, M; De Vocht, F; Denison-Day, J; Elwenspoek, MM C; Curtis, HJ; Bates, C; Mehrkar, A; Bacon, S; GOLDACRE, B; OpenSAFELY Collaborative,; Craggs, P; Amlôt, R; Francis, N; Little, P; Macleod, J; Moore, M; Morton, K; Rice, C; Sterne, J; Stuart, B; Towler, L; ... Yardley, L.
Implementation science : IS
Comparative effectiveness of nirmatrelvir/ritonavir versus sotrovimab and molnupiravir for preventing severe COVID-19 outcomes in non-hospitalised high-risk patients during Omicron waves: observational cohort study using the OpenSAFELY platform.
ZHENG, B; Tazare, J; Nab, L; Green, AC; Curtis, HJ; MAHALINGASIVAM, V; HERRETT, EL; COSTELLO, RE; EGGO, RM; Speed, V; Bacon, SC; Bates, C; Parry, J; Cockburn, J; Hester, F; Harper, S; Schaffer, AL; Hulme, WJ; Mehrkar, A; EVANS, SJ; MacKenna, B; GOLDACRE, B; Douglas, IJ; TOMLINSON, LA; OpenSAFELY Collaborative,;
The Lancet Regional Health - Europe
Comparative effectiveness of sotrovimab and molnupiravir for preventing severe COVID-19 outcomes in patients on kidney replacement therapy: observational study using the OpenSAFELY-UKRR and SRR databases.
ZHENG, B; Campbell, J; Carr, EJ; Tazare, J; Nab, L; MAHALINGASIVAM, V; Mehrkar, A; Santhakumaran, S; Steenkamp, R; Loud, F; Lyon, S; Scanlon, M; Hulme, WJ; Green, AC A; Curtis, HJ; Fisher, L; PARKER, E; GOLDACRE, B; Douglas, I; Evans, S; MacKenna, B; Bell, S; TOMLINSON, LA; NITSCH, D; OpenSAFELY Collaborative and LH&W NCS (or CONVALES,;
Clinical kidney journal
Impact of COVID-19 on recorded blood pressure screening and hypertension management in England: An analysis of monthly changes in Quality and Outcomes Framework indicators in OpenSAFELY
Wiedemann, M; Speed, V; Cunningham, C; Higgins, R; Curtis, H; Andrews, C; Fisher, L; Hopcroft, L; RENTSCH, C; MAHALINGASIVAM, V; TOMLINSON, L; Morton, C; Samuel, M; Green, A; Wood, C; Brown, A; Massey, J; Walters, C; Smith, R; Inglesby, P; Evans, D; Maude, S; Dillingham, I; Walker, A; Morley, J; ... MacKenna, B.
Ethnic differences in the indirect effects of the COVID-19 pandemic on clinical monitoring and hospitalisations for non-COVID conditions in England: a population-based, observational cohort study using the OpenSAFELY platform.
COSTELLO, RE; Tazare, J; Piehlmaier, D; HERRETT, E; Parker, EP K; ZHENG, B; Mansfield, KE; HENDERSON, AD; CARREIRA, H; BIDULKA, P; WONG, AY S; WARREN-GASH, C; Hayes, JF; Quint, JK; MacKenna, B; Mehrkar, A; EGGO, RM; Katikireddi, SV; TOMLINSON, L; LANGAN, SM; Mathur, R; LH&W NCS (or CONVALESCENCE) Collaborative,; OpenSAFELY collaborative,;
First dose COVID-19 vaccine coverage amongst adolescents and children in England: an analysis of 3.21 million patients' primary care records in situ using OpenSAFELY.
Hopcroft, LE; Curtis, HJ; Brown, AD; Hulme, WJ; Andrews, CD; Morton, CE; Inglesby, P; Morley, J; Mehrkar, A; Bacon, SC; EGGO, RM; MAHALINGASIVAM, V; Parker, EP K; TOMLINSON, LA; Bates, C; Cockburn, J; Parry, J; Hester, F; Harper, S; GOLDACRE, B; Walker, AJ; MacKenna, B;
Wellcome open research
Effectiveness of Sotrovimab and Molnupiravir in community settings in England across the Omicron BA.1 and BA.2 sublineages: emulated target trials using the OpenSAFELY platform
The OpenSAFELY collaborative,; TAZARE, J; Nab, L; ZHENG, B; Hulme, W; Green, A; Curtis, H; MAHALINGASIVAM, V; Higgins, R; SCHULTZE, A; BHASKARAN, K; Mehrkar, A; Schaffer, A; Smith, R; Bates, C; Cockburn, J; Parry, J; Hester, F; Harper, S; EGGO, R; Walker, A; MARKS, M; Brown, M; MARINGE, C; LEYRAT, C; ... DOUGLAS, I.
Comparative effectiveness of two- and three-dose COVID-19 vaccination schedules involving AZD1222 and BNT162b2 in people with kidney disease: a linked OpenSAFELY and UK Renal Registry cohort study.
OpenSAFELY Collaborative,; PARKER, EP K; Horne, EM F; Hulme, WJ; Tazare, J; ZHENG, B; Carr, EJ; Loud, F; Lyon, S; MAHALINGASIVAM, V; MacKenna, B; Mehrkar, A; Scanlon, M; Santhakumaran, S; Steenkamp, R; GOLDACRE, B; Sterne, JA C; NITSCH, D; TOMLINSON, LA; LH&W NCS (or CONVALESCENCE) Collaborative,;
The Lancet regional health. Europe
Protocol for an OpenSAFELY cohort study collecting patient-reported outcome measures using the TPP Airmid smartphone application and linked big data to quantify the health and economic costs of long COVID (OpenPROMPT).
HERRETT, E; TOMLIN, K; LIN, L-Y; TOMLINSON, LA; JIT, M; BRIGGS, A; MARKS, M; Sandmann, F; Parry, J; Bates, C; Morley, J; Bacon, S; Butler-Cole, B; MAHALINGASIVAM, V; Dennison, A; Smith, D; Gabriel, E; Mehrkar, A; GOLDACRE, B; SMEETH, L; EGGO, RM M;
BMJ Open
Factors associated with COVID-19 vaccine uptake in people with kidney disease: an OpenSAFELY cohort study.
OpenSAFELY Collaborative,; PARKER, EP; Tazare, J; Hulme, WJ; Bates, C; Carr, EJ; Cockburn, J; Curtis, HJ; Fisher, L; Green, AC; Harper, S; Hester, F; Horne, EM; Loud, F; Lyon, S; MAHALINGASIVAM, V; Mehrkar, A; Nab, L; Parry, J; Santhakumaran, S; Steenkamp, R; Sterne, JA; Walker, AJ; WILLIAMSON, EJ; Willicombe, M; ... TOMLINSON, LA.
BMJ Open
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