How do we know COVID-19 vaccines are safe?
Fox News
How do we know the COVID-19 vaccines are safe?
Different types of COVID-19 vaccines have been authorized and it’s possible side effects will differ for each — although there's more public data on the vaccines being rolled out in Western countries than elsewhere. Countries also vary in their vaccine standards, with some allowing the use of shots before final-stage testing involving large numbers of volunteers. But in the U.S., Britain and European Union, regulators required any vaccine to be tested in tens of thousands of people before distribution. So far, the U.S. is using shots from Pfizer and Moderna, while Britain and Europe have cleared those plus the AstraZeneca vaccine.More Related News