U.S. health officials on Friday dropped a controversial piece of coronavirus guidance and said anyone who has been in close contact with an infected person should get tested. The CDC essentially returned to its previous testing guidance, getting rid of language posted last month that said people didn’t need to get tested if they didn't feel sick. That change had set off a rash of criticism from health experts who couldn't fathom why the nation's top public health agency would say such a thing amid the pandemic.