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A key component of J&J vaccine could explain link to extremely rare blood clots Erika Edwards © Provided by NBC News A key ingredient in Johnson & Johnson’s Covid-19 vaccine could explain the possible link between the shots and the extremely rare blood clots reported in six patients in the U.S. The technology used in the drugmaker’s vaccine, called an adenovirus, is used to prompt an immune response against the coronavirus. But some experts say that it could instead — in rare cases — prompt an immune response against certain components in the blood that cause clottin...

Biden says US will have vaccines faster, prioritizes teachers

The Biden administration brokered the arrangement amid concerns about Johnson & Johnson's production delays.

Biden to announce ‘historic partnership’: Merck will help make Johnson & Johnson coronavirus vaccine, officials say Laurie McGinley, Christopher Rowland President Biden will announce Tuesday that pharmaceutical giant Merck will help make Johnson & Johnson’s single-shot coronavirus vaccine — an unusual pact between fierce competitors that could sharply boost the supply of the newly authorized vaccine, according to senior administration officials. The officials, who spoke on the condition of anonymity to discuss a matter that has not been announced, said they began ...

The arrangement, which was brokered by the White House, was reached amid concerns about Johnson & Johnson production delays