The mayor says there is an urgent need for blood with donations down significantly since the pandemic began.
First Lady Chirlane McCray also donated blood along with the mayor.
Before the virus struck, blood drives at businesses, churches and other sites were the biggest source of donated blood in the New York area.
Now, blood drives have almost completely stopped.
In April alone, blood center officials point out that donations in the area it covers dwindled to 14,000. In a typical month, they would collect twice that many.
MORE CORONAVIRUS COVID-19 COVERAGE
COVID-19 Help, Information and Resources
UPDATES
New York state
New Jersey
Connecticut
Long Island
Grieving the lost: Tri-State residents who have died
RELATED INFORMATION
Share your coronavirus story with Eyewitness News
Stimulus check scams and other coronavirus hoaxes
Coronavirus prevention: how clean are your hands?
Centers for Disease Control and Prevention on coronavirus
Total count of NYC COVID-19 cases based on patient address