New data on coronavirus vaccine effectiveness may be “a wakeup call”
Excerpt: Caitlin Owens A new preprint study that raises concerns about the mRNA vaccines' effectiveness against Delta — particularly Pfizer's — has already grabbed the attention of top Biden administration officials. What they're saying: The study found the Pfizer vaccine was only 42% effective against infection in July, when the Delta variant was dominant. "If that's not a wakeup call, ... Read more