Pfizer unexpectedly announced Friday that it had scrapped its bid to have its COVID-19 vaccine approved for children ages 6 months to 5 years old.The pharmaceutical giant and its partner, BioNTech, at the beginning of the month had applied for emergency use authorization with the Food and Drug Administration based on a quicker timeline of research on just two shots.But the companies announced Friday that they were going to “extend their rolling submission” to the FDA to await fuller testing on three-shot doses.
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