COVID-19 vaccines and virus transmission

COVID-19 vaccines have been deployed in the UK since December 2020. This article examines the impact of COVID-19 vaccines on transmission of the virus. It also considers the potential implications of vaccine-induced protection for easing lockdown restrictions and debate about potential introduction of immunity certification or a vaccine passport scheme.

COVID-19 vaccines and virus transmission

Changing the UK COVID-19 vaccine dosing schedule

On December 31, 2020 the four UK Chief Medical Officers (CMOs) published a statement announcing changes to the dosing schedule for the second dose of the Pfizer/BioNTech and University of Oxford/AstraZeneca vaccines. It stated that the interval between the first and second dose should be extended from 3–4 weeks to up to 12 weeks. This rapid response examines the evidence behind this decision.

Changing the UK COVID-19 vaccine dosing schedule

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