Vaccine effectiveness is zero to negative in nine months

This study (a Lancet preprint https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3949410 ) finds that Pfizer vaccine effectiveness wanes from 92% at day 15-30 to 47% at day 121-180, and from day 211 (seven months) and onwards “no effectiveness could be detected”. For AstraZeneca, vaccine effectiveness “was generally lower and waned faster, with no effectiveness detected from day 121 [four months] and onwards”. (The figure they found was actually negative, minus-19%.)

While effectiveness against severe outcomes held up for many groups over nine months, it was found to wane significantly among men, older frail people, and people with comorbidities, contributing to an overall fall from 89% at day 15-30 to 42% from day 181 (six months) and onwards, with a number of subgroups even showing negative efficacy against severe outcomes.

This graph in the paper points out the negative effectiveness against infection at nine months.

Hat tip to Dr. Robert Malone and Dailyskeptic.org

About budbromley

Bud is a retired life sciences executive. Bud's entrepreneurial leadership exceeded three decades. He was the senior business development, marketing and sales executive at four public corporations, each company a supplier of analytical and life sciences instrumentation, software, consumables and service. Prior to those positions, his 19 year career in Hewlett-Packard Company's Analytical Products Group included worldwide sales and marketing responsibility for Bioscience Products, Global Accounts and the International Olympic Committee, as well as international management assignments based in Japan and Latin America. Bud has visited and worked in more than 65 countries and lived and worked in 3 countries.
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