An unusual case of monkeypox was discovered in Massachusetts on Wednesday in a man who had just been to Canada, and health officials are investigating if it is linked to tiny outbreaks in Europe.

Monkeypox is mostly found in Africa, with a few occurrences in the United States and abroad probably connected to travel there. This month, the UK, Portugal, and Spain have all reported a limited number of confirmed or suspected cases.

As part of the probe, US health officials have been in contact with officials in the United Kingdom and Canada. “At this moment,” Jennifer McQuiston of the US Centers for Disease Control and Prevention stated, “we don’t have any information that ties the Massachusetts case to instances in the UK.”

“I do believe we are ready for the prospect of further instances,” she added, even though it is the sole case the CDC is aware of in the United States.

The public is not at risk in the United States, and the Massachusetts resident is hospitalized but in good health, according to officials.