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Got Questions About Johnson & Johnson's COVID-19 Vaccine? We Have Answers

A medical worker at South Shore University Hospital gets ready to administer the newly available Johnson & Johnson COVID-19 vaccine in Bay Shore, N.Y., Wednesday. Clinical research found it to be 85% effective in preventing severe disease four weeks after vaccination, and it has demonstrated promising indications of protection against a couple of concerning variants of the coronavirus. (Getty Images)
A medical worker at South Shore University Hospital gets ready to administer the newly available Johnson & Johnson COVID-19 vaccine in Bay Shore, N.Y., Wednesday. Clinical research found it to be 85% effective in preventing severe disease four weeks after vaccination, and it has demonstrated promising indications of protection against a couple of concerning variants of the coronavirus. (Getty Images)

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