Pfizer Inc. gained emergency U.S. authorization for its Covid-19 vaccine on Friday, completing an unprecedented scientific sprint that could eventually help bring an end to a pandemic that has killed nearly 300,000 Americans.
The Food and Drug…
Pfizer Inc. gained emergency U.S. authorization for its Covid-19 vaccine on Friday, completing an unprecedented scientific sprint that could eventually help bring an end to a pandemic that has killed nearly 300,000 Americans.
The Food and Drug…