By vgreene, 3 March, 2021 All 3 vaccines are considered to be highly efficacious However on December 17 2021 CDC endorsed updated guidance from the Advisory Committee on Immunization Practices ACIP expressing a clinical preference for individuals to receive an mRNA COVID 19 vaccin
By vgreene, 3 March, 2021 Note It s important to consider differences in virus transmission and presence of virus variants btwn the time periods during which clinical trials of the mRNA vaccines Moderna Pfizer BioNTech and the vector based Janssen were being conducted
