Educators in New York City have been urged to find at least 150,000 kids, who have not yet set foot in the classroom or did not show up on a given day as schools are experiencing a personnel crunch due to a vaccine mandate taking effect on October 4, the New York Post reported on Saturday.

"Reach out to every absent student every day," The Post reported, citing a memo issued by the U.S. Department of Education (DOE), which asked schools to follow up daily with each missing kid to know the reason why they have not shown up at school.

Schools in the city have had their difficulties as a teacher told The Post that they are "understaffed" and missing most "paras (classroom aides who serve kids with special needs)" after the vaccine mandate brought a "personnel crunch" for many schools.

Brooklyn Councilman Mark Treyger told The Post that he had heard from contacts that some 150,000 students "have not come into a building" since classes started September 13, while Michael Mulgrew, president of the United Federation of Teachers, told The Post he believed as many as 180,000 city kids may not have come to school at all.

The city reported a total of 955,490 children in pre-K through high school, down from 1,002,201 the year before, a loss of 46,711 students, The Post reported, citing the data from the Independent Budget Office.

The deduction has something to do with the remote education and quarantine rules amid the COVID-19 pandemic.

"We'll be providing preliminary enrollment data after rolls close at the end of the month," Nathaniel Styer, DOE spokesman, told The Post.

At present, America is starting to see cases and deaths tick downward with massive vaccination efforts since this Spring, though some Americans still remain hesitant to get vaccinated against COVID-19 and some even opted to lose their jobs instead of getting vaccinated in face of vaccine mandates.

Hospitalizations nationwide have been trending downward since the beginning of September, according to the U.S. Centers for Disease Control and Prevention, and the New York Times reported that deaths have fallen 10 percent since September 20, marking the first sustained decline since early summer.

But experts warned it's still too early to expect life can return to normal.

Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, told CNN that he wants to see the daily increase in cases lower than 10,000 cases per day before areas lift indoor mask requirements for vaccinated individuals.