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Pfizer says immunity can drop to 83% within four months in people who got its COVID-19 shot, further bolstering the company case for a booster

The effectiveness of Pfizer’s COVID-19 shot can drop to 83.7% within four to six months after getting the second dose of its vaccine. This is the latest indication that vaccine-induced immunity to the virus can wane and some kind of boost may be necessary in the future.

MSN MarketWatch - July 31, 2021

View the full story here: https://www.msn.com/en-us/money/markets/pfizer-says-immunity-can-drop-to-83percent-within-four-months-in-people-who-got-its-covid-19-shot-further-bolstering-the-company-case-for-a-booster/ar-AAMHZHM?ocid=st