Russia vaccine claim faces scepticism as nations renew virus battle: Russia claimed Tuesday (11 August) it has developed the world’s first vaccine offering “sustainable immunity” against the coronavirus, despite mounting scepticism about its effectiveness as fears grow over a second wave of infections across the globe.
'They've jumped the gun': scientists worry about Russia's Covid-19 vaccine: Rising chorus of concern over Sputnik V vaccine stems from opaque development and lack of mass testing
