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The boosted protection from a second booster shot of Pfizer’s COVID-19 vaccine against virus infection quickly waned, a new study found.
People with three doses have seen their protection against infection drop considerably following the emergence of the Omicron variant of SARS-CoV-2, also known as the CCP (Chinese Communist Party) virus.
That prompted Israeli regulators to clear a fourth dose, or second booster, of Pfizer’s jab in January.
While protection against infection did shoot up initially after the fourth dose, hitting 64 percent during the third week, it rapidly declined thereafter and hit 29 percent by 10 weeks post-administration, Israeli researchers found.
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