SEATTLE (AP) — Physicians and scientists say genetic testing of a Seattle-area nursing home resident shows the man has been infected twice with the coronavirus.

The man in his 60s first contracted COVID-19 in March and spent more than 40 days in the hospital. Doctors say he wasn’t as sick the second time and has since recovered.

The testing revealed the illness caused by the coronavirus in July wasn’t a relapse but a new infection with a different variant of the virus. The patient is only the third person in the United States confirmed to have been infected with COVID-19 twice.