Asad Zaidi

Comparative analysis of the risks of hospitalisation and death associated with SARS-CoV-2 omicron (B.1.1.529) and delta (B.1.617.2) variants in England: a cohort study.

Tommy Nyberg, Neil M. Ferguson, Sophie Nash et al. · 2022 · 1.2K citations · Full text

Hospital admission and emergency care attendance risk for SARS-CoV-2 delta (B.1.617.2) compared with alpha (B.1.1.7) variants of concern: a cohort study

Katherine A. Twohig, Tommy Nyberg, Asad Zaidi et al. · Cronfa (Swansea University) · 2021 · 545 citations · Full text

Household transmission of COVID-19 cases associated with SARS-CoV-2 delta variant (B.1.617.2): national case-control study

Hester Allen, Amoolya Vusirikala, Joe Flannagan et al. · The Lancet Regional Health - Europe · 2021 · 223 citations · Full text

Virus Epidemiology, Covid-19 Pandemic, Disease Outbreak +7

Effectiveness of COVID-19 vaccines against the Omicron (B.1.1.529) variant of concern

Nick Andrews, Julia Stowe, Freja Kirsebom et al. · 2021 · 192 citations · Full text

Immunodeficiencies, Immunology, Covid-19 Vaccines +19

Comparative transmission of SARS-CoV-2 Omicron (B.1.1.529) and Delta (B.1.617.2) variants and the impact of vaccination: national cohort study, England

Hester Allen, Elise Tessier, Charlie Turner et al. · Epidemiology and Infection · 2023 · 79 citations · Full text