Worth noting the limitations listed at the bottom.

> The accuracy of antibody testing varies widely. Moreover, most antibody tests were done for people seeking them out, which means that those who got tested are a self-selecting group and not a random sample.

> It also appears that New Yorkers in some neighborhoods with lower infection rates were more likely to seek antibody testing.

> In some wealthy and largely white ZIP codes in Manhattan, some 30 percent of people may have gotten an antibody test. But in Corona, for instance, where the positive rate was highest, less than a quarter of people got tested.