Amid escalating tensions between Iran and the West, Iranian Supreme Leader Ali Khamenei said he doesn't trust Covid -19 vaccines from the US and its allies.
Oxford University's Regius Professor of Medicine, Sir John Bell, said that researchers in Oxford were analyzing whether current vaccines would work against the mutated virus.
The British Medical Journal editor has asked the New York Times to correct an article that claims UK guidelines allow two Covid-19 vaccines to be mixed.