Debate is intensifying over the idea of accelerating the U.S. vaccination campaign by giving people just one dose instead of two for the time being. It has also gained ground in recent days after new research on the effectiveness of receiving only one dose, with a second dose planned for a few months down the line when supply shortages ease. Backers of delaying the second dose, though, say those concerns are theoretical, and there is no evidence that new variants would emerge before the second dose was eventually given a few months later. Some people also might never return to get a second dose, once told they could delay it, permanently leaving them with a lower level of protection. They really never get that second dose, which means they won’t have long-lasting and better immunity.”One easier decision could be to give just one dose to people who have already had COVID-19, as mounting research indicates is sufficient.
