As CDC reverses itself on COVID-19, Americans are losing trust, warn public-health experts

People who are exposed to a COVID-19 patient but feel fine don’t necessarily need to get tested, the nation’s top public health agency declared in August — only to drop that advice last Friday.The same day, it declared that the coronavirus could spread beyond the 6-foot social distancing threshold, borne by “aerosol” particles that remain aloft for minutes.But this week the U.S. Centers for Disease Control and Prevention took down that update, too, saying it shouldn’t have been posted without review.The reversals have alarmed veterans of the public-health community, warning that they could fue...

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