Therapeutic drugs, rather than vaccines, might likewise change the fight against Covid-19.
While some steps in the vaccine timeline can be fast-tracked or skipped entirely, approvals aren’t one of them. There are horror stories from the past where vaccines were not properly tested. In the 1950s, for example, a poorly produced batch of a polio vaccine was approved in a few hours. It contained a version of the virus that wasn’t quite dead, so patients who got it actually contracted polio. Several children died.