COVID-19 rapid tests are easy to take—and then toss. So most people never report their results, which leaves health officials with an incomplete picture of how much virus is circulating and where. The ...

Testing yourself for coronavirus infection can be more convenient than getting a clinic or lab test, but from a public health standpoint, experts say there’s at least one key downside. In the US, ...

Until the worldwide explosion of the omicron variant, it seemed that showing your vaccination card would be enough to resume many aspects of normal life. Increasingly, however, you also may need to ...