LOS ANGELES - Following the recent emergency approval by U.S. regulators for a coronavirus vaccine from Johnson & Johnson which contains a single-dose regimen, some medical experts are saying one dose isn’t enough for full protection against COVID-19. "You would be flying blind to just use one dose," said one senior scientist and adviser to President Joe Biden told the Wall Street Journal. "If you’re going to do something else other than follow the studies shown to the FDA, show me that this one-shot effect is durable."But some lawmakers and health officials have urged that the U.S.
needs to shift to a single-dose regimen for all coronavirus vaccines.Acting Health and Human Services Secretary Norris Cochran along with seven physician.