Covid Update: the Vaccine Edition Dr. Mao gives the latest covid update and the new mRNA vaccine announced by Pfizer and discusses how it works as contrasted with conventional vaccines, advantages, and potential challenges. Covid-19 UpdateDr. Mao Shing Ni, L.Ac., D.O.M., Ph.D., Dipl. C.H., Dipl. ABAAPNovember 19, 2020covid19, vaccines Facebook0 Twitter Reddit Pinterest0 0 Likes