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1 post found for July 2021

‘What did “90% efficacy” really mean?’

Since the November 2020 headlines of “90%” vaccine efficacy, financial markets have generally believed that vaccines would eradicate COVID and therefore end the need for lockdowns, allowing normality to resume. It is probable that vaccine efficacy was never “90%” against transmission and that the efficacy against symptomatic infection wears off, hence the need for regular or annual “boosters”. It is almost certainly not correct to say that the vaccines provide “90% efficacy” for life against either infection or disease progression which is how the original headlines were interpreted and how the general population views the “vaccine solution”.