“NYSDOH is closely monitoring an upward trend in pediatric hospitalizations associated with COVID-19,” the notice read.

The jump in hospitalizations of children — who usually face very mild COVID-19 cases — is “concentrated in New York City and the surrounding greater metropolitan area,” according to the health advisory.

Pediatric admissions in the city have risen four-fold from the week starting December 5, 2021, to the week starting December 19, according to the bulletin, which did not quantify the actual number of children hospitalized.