FACT FINDERS: Vaccine Protection, Eight Months Later

T-shirt with a covid-19 sticker
University of Arizona Immunobiologist Dr. Deepta Bhattacharya says the vaccine is proving to wane a little against the original variants after eight months. He says it goes from about 96% effective down to about 84%. But, he says, the hot-button question sparking debate among experts is whether it has waned much more rapidly when faced with Delta. They’re trying to determine that now.