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High-profile doctors spreading Covid-19 disinformation collectively reach millions of Americans, and a dangerous number of people believe their falsehoods. CNN speaks to one of these doctors and counters each incorrect statement with the truth. CNN's Drew Griffin reports.

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The CDC is currently evaluating a "test-to-stay" method in schools, where a student who may have been exposed to Covid-19 can continue to attend school in person instead of quarantining at home, as long as they test negative. CNN's Jacqueline Howard has more.

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Health officials worry that anti-vaccine activists will seize upon Colin Powell's death to make the claim that vaccines don't work. They might ask, "If you can still die after being vaccinated for Covid-19, what's the point of getting the vaccine?" CNN Medical Analyst Dr. Leana Wen offers answers.