At the same time, the National Academies of Sciences, Engineering, and Medicine (NASEM) committee rejected a causal relationship between the Pfizer-BioNTech BNT162b2 and Moderna mRNA-1273 (Comirnaty and Spikevax, respectively) mRNA COVID vaccines and female infertility, Guillain-Barré syndrome, Bell's palsy, thrombosis with thrombocytopenia syndrome (TTS), and myocardial infarction.The evidence was also deemed enough to reject a causal link between the Pfizer vaccine and ischemic stroke. There was insufficient data to say the same for the Moderna one, however, according to a reportopens in a new tab or window commissioned by the Health Resources and Services Administration (HRSA), a subagency of the HHS.
