JoNel Aleccia

Why the U.S. Is Underestimating Covid Reinfection

Hundreds of Americans suspect they contracted covid early in the pandemic and recovered, only to get infected again months later. But because the U.S. does so little genetic sequencing of covid samples, we don’t know much about reinfection rates.

At Risk of Extinction, Black-Footed Ferrets Get Experimental COVID Vaccine

Months before federal officials authorized experimental vaccines to ward off the coronavirus in humans, scientists tried a veterinary vaccine in endangered ferrets. Drugmakers are researching similar efforts for other animals proving vulnerable to the virus, such as farmed minks, in part to guard against virus mutations that could pose new risks to people.