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A study by CDC and Kaiser Health News reveals that Pfizer and Moderna vaccines are highly effective in preventing COVID-19 hospitalizations among seniors. Fully vaccinated individuals have the best protection, but even one dose significantly reduces hospitalization risk. However, seniors remain vulnerable in the first two weeks post-vaccination. Moderna plans to increase vaccine production to 3 billion doses in 2022, with facilities in the US, Switzerland, and Spain. The shelf life of Moderna's vaccine has also been extended to three months.

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