KGO ABC World News Tonight With David Muir April 16, 2021 00:38:00
People in a riskier situation. >> the picture across the nation. whit, you reported pfizer ceo predicting americans might need a third shot within a year, a booster after being vaccinated. and i know tonight there's new data out on how many people have been infected with the virus after being vaccinated, and the number is very low, which is encouraging. >> reporter: david, they're called breakthrough infections, and these new numbers we're getting from the cdc show of the 66 million americans who have now been fully vaccinated, there were only 5,800 covid cases. that represents just .008% of t...