COVID-19 vaccine shortages in New York City have forced officials to reschedule more 23,000 appointments and for multiple vaccination hubs to shut down.

Vaccination sites, like the South Bronx Educational Campus in Melrose, will reopen once it gets more doses of the vaccine. The site is one out of 15 vaccination hubs that were forced to close because of lack of supply.

In Brooklyn, vaccine sites at the Bushwick Educational Campus and Canarsie High School are also part of the list.

As of now, the city's Health Department has posted on its website that anyone with an appointment at a COVID-19 vaccine hub between Jan. 21 through Jan. 24 will be rescheduled for next week.

Mayor Bill de Blasio says he's counting on the Biden administration to announce details in the upcoming days to assist in ramping up efforts to receive a larger supply of vaccines.

According to the mayor and health officials, 300,000 second doses of the vaccine were delivered on Thursday. As of now, officials say they hope to use some of those vaccines on people who need to get the first dose.

Health officials say there's still a window after the 21- or 28-day period where it won't cause harm for people who take the second dose a couple days late.