Can a Daily Pill Stop a Constant Killer in Its Tracks?

Hi, it’s Jason. I tested positive for Covid just as a friend flew in from San Francisco to stay with me in Melbourne for a long-awaited Australian vacation. If only there were a pill to keep him from catching it too, I thought. More on that later. First...

For years, people have taken antiviral medications to fend off the flu and HIV, and more recently, the antibiotic doxycycline has been shown to help prevent some sexually transmitted infections. Now, researchers say a daily pill could do the same for Covid — at least for people exposed to an infected household member.