Published on: Thursday, May 06, 2021 By: AFP Text Size: People wait in a line to refill oxygen cylinders for Covid-19 patients at a refilling centre in New Delhi. MUMBAI: India on Wednesday pledged billions of dollars to boost its flagging vaccine programme, as President Joe Biden said 70 percent of American adults should have had at least one coronavirus shot by July 4. With vaccines among the main weapons in the fight against the pandemic, pharma giant Pfizer reported a huge jump in profits based on sales of its Covid-19 shot as a growing campaign called for patent waivers so poorer nation...