![Most vaccines take years to develop, but the coronavirus's crushing economic blow has driven companies and governments to radically step up the pace to find a drug that will inoculate millions of people [File: Akos Stiller/Bloomberg]](https://www.aljazeera.com/mritems/imagecache/mbdxxlarge/mritems/Images/2020/8/21/2197c00555e849cf9f503d2f12194ef8_18.jpg)
Pfizer Inc. and BioNTech SE said the Covid-19 vaccine they are jointly developing is on track to be submitted for regulatory review as early as October, as they released additional data from an early-stage study.
The companies said the vaccine was well tolerated with mild to moderate fever in fewer than 20% of the participants. The companies are continuing to analyze data from the…