City Councilman Ben Kallos, who represents the area, said the Blood Center has not been transparent about the lab.

“I hate to think of what they’re cooking up in there,” he said.

The Blood Center told The Post the lab will be for its use only and “is a necessary component for the research and development of new antivirals and vaccines.” It said it has used the lab for hepatitis and HIV research in the past.

The Blood Center has tried unsuccessfully for a rezoning and expansion several times, Kallos said.