In March 2020, the virus held many mysteries. Some early assumptions didn’t hold up, while other key findings wouldn’t come until much later. If we could do it all over again…
A trendy workout delivers electrical impulses to your muscles to try to supercharge regular exercise. Scientists say it is no shortcut to a Marvel physique.
There’s a flood of do-it-yourself healthcare apps, gadgets and home tests. Here’s how to navigate the options—and tell what’s useful, reliable and safe.