NPR Notícias de negócios: Pfizer-BioNTech COVID vaccine appears more than 90% effective in kids 5 to 11

Pfizer-BioNTech COVID vaccine appears more than 90% effective in kids 5 to 11
The companies studied a 10 microgram vaccine dose in children 5 to 11, a third of the dose used for adults, to minimize side effects and because it still prompts a strong immune response.

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