Researchers at Mount Sinai in New York studied almost 20,000 patients with COVID-19. They found that more than 90 percent of those with mild-to-moderate COVID-19 symptoms have antibodies for at least three months.

The study, which has been published on the pre-print server medRxiv, does not prove that antibodies protect against reinfection from the virus. But most experts believe these antibodies decrease your odds of getting reinfected and might lessen the disease severity if you are infected.