A second dose of Johnson & Johnson doesn't currently seem necessary to fight off delta variant, CDC director says

Dr. Rochelle Walensky said today on NBC’s "Today" show that "right now, we have no information to suggest that you need a second shot after J&J, even with the delta variant," despite some experts floating the idea of a second dose. US Surgeon General Dr. Vivek Murthy also said this week that "we have reasons to be hopeful" about the way Johnson & Johnson's coronavirus vaccine will protect against the delta variant.