The study was posted online Tuesday but had not been peer-reviewed yet. The study, conducted by a group of scientists from Icahn School of Medicine at Mount Sinai, used results from 1,343 people in the New York City area.
The study relied on a test developed by Florian Krammer, a virologist at the Icahn School of Medicine at Mount Sinai, that has a less than 1 percent chance of producing false-positive results.
The study found no difference in antibody production by degree of sickness, age, or sex.
The study hints that anyone who recovers from the infection may safely return to work. However, it is still unclear how long the antibody protection might last.