The U.S. Food and Drug Administration may not renew its authorization for Pfizer's COVID-19 vaccine approved for children under the age of 5 ahead of the peak season, according to multiple outlets.

Pfizer's vaccine is the only shot approved for all children — Moderna's vaccine is approved for children with certain health conditions and Novavax's shot is approved for children ages 12 and older.

The Guardian reported Tuesday that it had obtained an email from national health agencies sent earlier this month that specified the FDA would not renew the emergency use authorization for Pfizer's pediatric COVID-19 vaccine.

Pfizer reportedly confirmed this information to CNBC .

The email obtained by The Guardian also said that the Centers for Disease Control and Prevention was in talks with

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