Officials say doses of the Pfizer COVID-19 vaccine will be administered based on priority, with high-risk health workers and nursing home residents coming first.

Northwell Health is set to get doses of the COVID-19 within the next 48 hours, which means health care workers will be ready to get their first injections by Sunday or Monday.

The FDA approved the vaccine Friday night.

Northwell Health, which operates 19 hospitals on Long Island, Westchester and New York City, will start giving vaccines to their workers based on their job functions, department and age.

Deputy Chief Medical Officer Dr. Mark Jarrett says the doses will be distributed to different departments in case there are side effects.

Jarrett says physicians, nurses and environmental workers working in critical care and the emergency room will be some of the first to get the vaccine.

He says he anticipates some workers may be hesitant at first, but it's more about their own personal protection.

Between the two vaccines makers, Pfizer and Moderna, 500,000 doses are set to be delivered to New York. Gov. Andrew Cuomo says nursing home residents and staff will also be the first to get the vaccine, as well as EMS workers.

Northwell Health officials say the vaccine is not mandated, but a personal decision and they will not enforce their employees to take it.