Coronavirus: Vaccination

(asked on 4th March 2021) - View Source

Question to the Department of Health and Social Care:

To ask Her Majesty's Government what plans they have to monitor the effectiveness of vaccines at preventing transmission of COVID-19, and when they expect to be able to assess whether vaccines are preventing transmission.


Answered by
Lord Bethell Portrait
Lord Bethell
This question was answered on 19th March 2021

Public Health England (PHE) is monitoring the impact of COVID-19 vaccines on a broad range of outcomes, including symptomatic disease, infection, and hospitalisations. PHE has reported early vaccine effectiveness estimates in the elderly and in healthcare workers. These estimates show sustained protection against symptomatic disease, infection, hospitalisations, and mortality beyond 21 days after a single dose of the vaccine.

Preliminary evidence suggests that the COVID-19 vaccines protect against infection, both symptomatic and asymptomatic, at least in the short term, which is likely to lead to reduced transmission. Definitive evidence on transmission requires studies in household contacts of cases and such studies are not expected to be available until late April 2021.

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