Study led by FDA researchers didn’t find that the Pfizer-BioNTech COVID-19 vaccine caused blood clots, contrary to viral claims on social media
Certain COVID-19 vaccines, specifically the viral vector vaccines like the AstraZeneca and J & J vaccines, are associated with an increased risk of a blood clotting disorder called vaccine-induced thrombotic thrombocytopenia, which can be fatal. At the moment, there isn’t evidence indicating that mRNA COVID-19 vaccines are associated with the same risk. However, it’s important to also consider that getting COVID-19 itself increases a person’s risk of developing blood clotting problems to a greater extent than the viral vector COVID-19 vaccines.