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A study by the University of Texas Medical Branch, in partnership with Kaiser Health News, reveals that Pfizer's COVID-19 vaccine is effective against a virus mutation. The study involved blood samples from 20 clinical trial participants. While results are promising, more data is needed. Meanwhile, Moderna's CEO claims their vaccine may offer protection for years, as antibodies decay slowly. Moderna is also close to proving its vaccine's effectiveness against new strains from the UK and South Africa. The Moderna vaccine has been authorized for use in the UK.

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