A single case of the rare but serious monkeypox virus has been confirmed in Massachusetts in a man. Recent cases in the United Kingdom, Spain, and Portugal have been linked to men who have sex with other men.

The U.S. Centers for Disease Control and Prevention (CDC) confirmed the U.S. case on Wednesday, after initial testing completed late Tuesday at the State Public Health Laboratory in Jamaica Plain.

The man poses no risk to the public and is in hospital in good condition, the Massachusetts Department of Public Health (DPH) said in its release.