How effective is one Covid vaccine dose?
Calculating the protection given by the Pfizer/BioNtech vaccine.
Would it make more sense to vaccinate more people by delaying the second doses of vaccines for Covid 19? That is a debate going on at the moment. The UK has decided to delay the second dose for up to three months.
We recently received an email from a listener who says he first heard that the Pfizer/BioNtech vaccine was 52% effective after the first dose and 95% after the second. Now he has been told that the first dose now has an effectiveness of 90%. Which is correct? Tim Harford looks into it.
Plus, is a new Variant first spotted in the UK really 70% more transmissible than previous variants?
Presenter: Tim Harford
Producer: Kate Lamble and Charlotte McDonald
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- Sat 16 Jan 2021 02:50GMT91福利社 World Service News Internet, Europe and the Middle East & East Asia only
- Sat 16 Jan 2021 16:50GMT91福利社 World Service News Internet
- Sun 17 Jan 2021 02:50GMT91福利社 World Service Americas and the Caribbean, UK DAB/Freeview, East and Southern Africa, Online & West and Central Africa only
- Sun 17 Jan 2021 05:50GMT91福利社 World Service except Americas and the Caribbean & East and Southern Africa
- Sun 17 Jan 2021 15:50GMT91福利社 World Service except News Internet
- Sun 17 Jan 2021 22:50GMT91福利社 World Service
- Mon 18 Jan 2021 10:50GMT91福利社 World Service
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Tim Harford explains the numbers and statistics used in everyday life
