The first human clinical trials for Pfizer’s and BioNTech’s experimental COVID-19 vaccine, BNT162, have begun in the U.S. The vaccine is undergoing an accelerated trial process that Pfizer’s CEO Albert Bourla called “extraordinary.”
Four different versions of the vaccine, which uses messenger RNA (mRNA), will be administered to the volunteer subjects. According to researchers at University of Pennsylvania and Duke University, mRNA vaccines have potential safety issues, including local and systemic inflammation and stimulation of auto-reactive antibodies and autoimmunity, as well as development of edema (swelling) and blood clots.
SOURCE: The Vaccine Reaction May 25, 2020