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The Worst Animal in the World

Every year, as many as 400 million people are infected with life-threatening diseases by the Aedes aegypti mosquito. It wasn’t always so dangerous.

Waste-watching: Sewage can help track pandemic virus trends

Across the U.S. and in Europe, researchers and health officials say they can track the course of a community outbreak of the new coronavirus by studying the waste flushed from its bathrooms. And that can provide a valuable addition to public health tools, they say.

2 types of testing look for COVID-19 infections new and old

Testing is critical to controlling the coronavirus and eventually easing restrictions that have halted daily life for most Americans. But there’s been confusion about what kinds of tests are available and what they actually measure.

Best strategies against virus: Track, isolate, communicate

Some strategies are proving more effective than others in containing the COVID-19 pandemic: pro-active efforts to track down and isolate the infected, access to basic, affordable public health care, and clear, reassuring messaging from leaders.