Question to the Department of Health and Social Care:
To ask the Secretary of State for Health and Social Care, what plans his Department has to study the efficacy of a single dose of the Pfizer/BioNTech covid-19 vaccine beyond 21 days.
Public Health England (PHE) has been monitoring the effectiveness of the vaccines. Early data has shown that the Pfizer vaccine is highly effective in reducing COVID-19 infections among older people aged 70 years old and over. Since January, protection against symptomatic COVID-19 four weeks after the first dose ranged from 57-61% for one dose.
PHE has also undertaken their first analysis of the early effects of COVID-19 vaccination using routine testing and vaccination data across England. This data, published in a pre-print on 1 March 2021, provides early evidence that a single dose of the Pfizer vaccine is having a significant effect on the reduction of COVID-19 infection, hospitalisations and deaths in those over 70 years old. The Pfizer vaccine was shown as approximately 60-70% effective, rising to 85-90% after two doses. This analysis is available at the following link: