CityMD, which operates dozens of walk-in clinics in New York, confirmed the data to the Times and CNN.

While these two working-class neighborhoods saw high numbers for their antibody tests, only 13% of people tested positive for antibodies at a clinic in Cobble Hill, a mostly white and wealthy neighborhood in Brooklyn.

"We can't tell people to act differently, to not protect themselves, to not wash their hands, to not wear masks."

Even though the majority of people tested in those clinics had antibodies, that data do not reflect how many people in the neighborhoods themselves may have antibodies because some patients in the clinics may not live in the neighborhoods where the clinics are located.

Overall, nationwide data has been clear that Black and Brown communities across the United States have experienced higher rates of hospitalization or death from Covid-19 than White communities.