The U.S. now has about a million confirmed coronavirus cases. Epidemiologist Janet Hamilton says many different tests have been manufactured, and their accuracies vary. She also explains the different (and sometimes intermittent) symptoms, the role of air quality and temperature in the virus’ survival, and whether you’re immune to another infection if you’ve recovered from COVID-19.
What we’ve learned: COVID-19 tests, contagion, immunity
From this Episode: