Health

Why is Oxford’s half-dose coronavirus vaccine more effective than the full dose?

In reporting that its coronavirus vaccine reached up to 90% efficacy in clinical trials, AstraZeneca and Oxford University also noted that the jab was more effective when given in a half-dose regimen as opposed to a full. 

AstraZeneca elaborated on the findings in a press release posted Monday.

“One dosing regimen showed vaccine efficacy of 90% when AZD1222 [the vaccine] was given as a half dose, followed by a full dose at least one month apart, and another dosing regimen showed 62%…


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