Two doses of either the Pfizer/BioNTech or Oxford/AstraZeneca vaccines provide good protection against symptomatic infections by the delta coronavirus variant, but both vaccines are around 15 per cent less effective against delta than against the alpha variant, according to a large study in the UK. The findings also show a waning of protection over time, and imply that vaccinated people who do get infected might be just as infectious as unvaccinated people.
The key message is that it is important …
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