"Respected @POTUS, if we are to truly unite in beating this virus, on behalf of the vaccine industry outside the U.S., I humbly request you to lift the embargo of raw material exports out of the U.S. so that vaccine production can ramp up," SII Chief Executive Adar Poonawalla said in a tweet.

SII is making the AstraZeneca shot for the world and will soon start producing the Novavax vaccine.

(Reporting by Krishna N. Das and Chandini Monnappa)