Countries around the world are seeking supplies of vaccine they hope will allow the reopening of schools and businesses and the resumption of travel. The UK has also begun administering doses of the Pfizer-BioNTech shot, and European drug authorities cleared it for use on Monday.
Pfizer Inc. and partner BioNTech SE agreed to supply an additional 100 million doses of their Covid-19 vaccine to the US, as the country seeks to widen its immunization program and revive its economy.
The agreement brings the total number of doses to be delivered to the US to 200 million, the companies said Wednesday in a statement. The drugmaker expects to deliver all the doses to US vaccine and drug accelerator Operation Warp Speed by July 31.

