Russia says its Sputnik V Covid-19 vaccine is up to 95% effective

(David Cheskin/PA)

A coronavirus vaccine developed by Russia is up to 95% effective at stopping people developing Covid-19 symptoms, according to its developers.

Second interim data from the Sputnik V vaccine appears to provide 91.4% protection 28 days after the first dose and the researchers say the figure is as high as 95% 42 days after the first dose.