How The One-Shot COVID Vaccine Changes Things

The Janssen COVID-19 vaccine, developed by Johnson & Johnson, has received Emergency Use Authorization for adults 18 and over. It differs from other vaccines like Moderna and Pfizer in its mechanism, using a viral vector instead of mRNA. The vaccine is about 66% effective in preventing moderate to severe COVID-19 cases and can be stored in a refrigerator for up to three months, making it easier to distribute. It was tested against new variants and showed efficacy. Additionally, it may help prevent asymptomatic infections, potentially reducing transmission.

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