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The Centers for Disease Control and Prevention released three studies on Wednesday that, according to federal officials, provided evidence that all Americans would need booster shots of the Pfizer BioNTech and Moderna coronavirus vaccines…

A single dose of the Covid-19 vaccine manufactured by Johnson & Johnson is highly effective in preventing serious illness and death from the delta and beta variants of the coronavirus, data from a clinical study in South Africa…

Several measures to mitigate Covid-19 - including improving ventilation, requiring adults to wear face masks, and taking frequent surveillance tests - can help keep schools open and students safe, according to two new studies.The studies,…

An Israeli health worker from Maccabi Healthcare Services prepares to administer a dose of the Pfizer BioNtech vaccine in Tel Aviv on February 24, 2021.Jack Guez | AFP | Getty ImagesData from Israel, which vaccinated the vast majority of…

Almost 30 million people in the United States - and likely many others whose diseases have never been diagnosed - have been infected with the coronavirus to date. Should these people still be vaccinated?Two new studies answer this question…

Almost 30 million people in the United States - and likely many others whose diseases have never been diagnosed - have been infected with the coronavirus to date. Should these people still be vaccinated?Two new studies answer this question…