Note that some links may require registration or subscription. The Government Accountability Office isn't satisfied that COVID-19 vaccine makers can provide enough shots for all U.S. adults, despite their commitments to ship more than a billion doses. However, Moderna said it will need more than a few months to further expand manufacturing capacity for its vaccine. ( Reuters) As of Thursday at 8:00 a.m. EST, the unofficial U.S. COVID-19 toll stood at 31,422,380 cases and 564,405 deaths -- up 75,457 and 956, respectively, in the previous 24 hours. About 29.6% of the U.S. adult population is now fully vaccinated, including 63% of those 65 and older. (