Live Covid-19 Tracker and Updates

Here’s what you need to know: ImageA health care worker handed a test kit to a motorist at a drive-in virus testing center in Los Angeles last month.Credit…Mario Tama/Getty Images The C.D.C. reverses its guidance on testing for people who were exposed to the virus and aren’t showing symptoms. The Centers for Disease Control and…

Republicans Killed the Obamacare Mandate. New Data Shows It Didn’t Really Matter.

ImageThe Affordable Care Act has survived many attempts to stop it, including the stripping of the individual mandate. Credit…Tim Gruber for The New York Times Health economists long had a favorite metaphor for explaining why Obamacare’s unpopular individual mandate was good policy: the three-legged stool. Obamacare would work, they’d explain, only if it did three things:…