One dose of Pfizer, Moderna COVID vaccine is 80% effective: CDC study

Just a single dose of either the Pfizer or Moderna vaccine was shown to be 80 percent effective in preventing COVID-19 in a new CDC study.

The high level of protection occurs within the first two weeks after receiving part one of the two-dose regime, researchers said. “These interim vaccine effectiveness findings for both Pfizer-BioNTech’s and Moderna’s mRNA vaccines in real-world conditions … demonstrate that current vaccination efforts are resulting in substantial preventive benefits among working-age adults,” according to the federal Centers for Disease Control and Prevention.