Coronavirus update: J&J reports good vaccine results, so does Novavax Health officials say the vaccines currently being used appear to be safe 01/29/2021 Total U.S. confirmed cases: 25,789,000 (25,620,883) Total U.S. deaths: 433,622 (429,870) Total global cases: 101,636,470 (101,068,455) Total global deaths: 2,194,790 (2,180,021) J&J vaccine was 72 percent effective in clinical trial Johnson & Johnson has reported the results of its Phase 3 clinical trial of its coronavirus (COVID-19) vaccine candidate, saying it was 72 percent effective in preventing the virus in the U.S. trial. While that is less than the 95 percent rate achieved by Moderna and Pfizer, Johnson & Johnson said its single-dose vaccine was 85 percent effective at preventing severe COVID-19 illnesses.