Re­searchers move clos­er to de­ci­pher­ing blood clots from As­traZeneca, J&J's Covid-19 vac­cines

Re­searchers may be near­ing an an­swer for the mys­te­ri­ous and life-threat­en­ing blood clots that ap­peared on very rare oc­ca­sions in peo­ple who re­ceived the J&J or As­traZeneca Covid-19 vac­cine.

The new work builds on an ear­ly hy­poth­e­sis re­searchers in Nor­way put for­ward last spring, when the cas­es first cropped up. They pro­posed the events were sim­i­lar to blood clots that can oc­cur in a small sub­set of pa­tients who re­ceive he­parin, one of the most com­mon­ly used blood thin­ners.

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