One in three doctors hospitalized in Oslo after being vaccinated with the AstraZeneca vaccine has died, experts are studying the possible connection of the lethal outcome with the vaccine.

India's two leading vaccine manufacturers, vaccineers AstraZeneca and Johnson & Johnson, have warned global vaccine production is under threat from US export controls amid the pandemic.

Certain EU countries are considering the possibility of starting negotiations with manufacturers of the Russian vaccine against the Sputnik V coronavirus, said an EU official in talks with vaccine manufacturers.