We want a COVID-19 vaccine ASAP — that's a big ask. Here's how long vaccines normally take, and which diseases still don't have vaccines at all. ...read more
Multiple vaccines might be necessary to account for variations in effectiveness and how well they protect different populations of people. ...read more
Experts say communities must massively scale up COVID-19 testing, with quicker turnaround times. New test innovations in the works promise to do just that. ...read more
A Texas physician claims to have treated hundreds of COVID-19 patients with everyone's favorite sleep aid. But there's reasons to be wary of the hype. ...read more
Alzheimer's is just one of many brain disorders that can cause declines in memory, thinking and judgment — each associated with different causes, symptoms and treatments. ...read more