Animal test subjects. mRNA vaccines for coronaviruses have been in development for 2 decades, but always failed animal testing because the subjects died. I don't have links right now, but search for 2004 and 2012 mrna trials. Read the .edu link reports for the primary source info. The reports have summary articles that are short.
Animal test subjects. mRNA vaccines for coronaviruses have been in development for 2 decades, but always failed animal testing because the subjects died. I don't have links right now, but search for 2004 and 2012 mrna trials. Read the .edu link reports for the primary source info. The reports have summary articles that are short.
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