Nature News & Comment
Two-Shot Regimen Matters in Fighting Delta Variant
New research on the fast-moving variant suggests that a single shot is not enough to ensure protection against the COVID-19 virus
A peer-reviewed report from scientists in France, published Thursday in the journal Nature, found that the delta variant has mutations that allow it to evade some of the neutralizing antibodies produced by vaccines or by a natural infection. A single shot of a two-dose vaccine “barely” offers any protection.
But the experiments found that fully vaccinated people — with the recommended regimen of two shots of the Pfizer-BioNTech or AstraZeneca vaccine — should retain significant protection against the delta variant. That echoes another report authored by a collaboration of scientists in the United States and published Wednesday in the New England Journal of Medicine.