AstraZeneca insisted Wednesday that its COVID-19 vaccine is strongly effective even after counting additional illnesses in its disputed U.S. study, the latest in an extraordinary public rift with American officials.
Drugs giants Pfizer and AstraZeneca have rejected an NHS claim that the UK is facing a COVID-19 vaccine shortage, insisting there is no threat to supplies.
A Government scientist has recommended wearing three layer masks to prevent the spread of Covid-19.
