COVID variants: is one dose better than nothing?
April 26, 2021…ach added, “we could be wrong.” (Serebrin J. Canadian Press, 2 March 2021. www.thestar.com/news/canada/2021/02/03/fear-that-delayed-second-covid-19-vaccine-dose-could-lead-to-new-variants-realistic.html). How these variants have emerged has not been determined. The pandemic strain (D614G) is a variant that supplanted the Wuhan strain and soon became dominant due to enhanced infectivity of the upper respiratory tract (Plante et al. Nature 2021;592:…