Researchers investigating rare heart-related risks linked to Covid-19 vaccines are exploring several emerging theories, including one centered on the spike protein made in response to the shots
As U.S. health authorities expand use of the leading Covid-19 vaccines, researchers investigatinglinked to the shots are exploring several emerging theories, including one centered on the spike protein made in response to vaccination.
Researchers aren’t certain why the messenger RNA vaccines, one from Pfizer Inc. and partner BioNTech SE and the other from Moderna Inc., are likely causing the inflammatory heart conditions myocarditis and pericarditis
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