Dr. Howard Smith Oncall

  Vidcast:  https://youtu.be/5BEkGQKYkH4   An excellent video from the Children’s Hospital of Philadephia and the University of Pennsylvania that demonstrates how mRNA vaccines such as the Moderna and the Pfizer vaccines work to produce immunity against the CoVid19 virus.   https://vaccinemakers.org/resources/videos-animations   #CoVid #mRNA #vaccine #moderna #pfizer CoVid, mRNA, vaccine, moderna, pfizer