Health officials in Massachusetts have tested positive for the virus in a man, making it the first rare protein found in the United States this year.

According to a release from the Massachusetts Department of Health, the patient was an elderly adult who had recently visited Canada. The department completed its first test on Tuesday, approved by the Centers for Disease Control and Prevention.

“The case does not pose a threat to anyone, people are in hospital and in stable condition,” MDPH said. “DPH works closely with the CDC, relevant local health centers, and patient health care providers to identify potential partners with the patient during an outbreak.”

It comes as four more cases of the disease have been identified in the U.K. recently, bringing its total to nine countries since early May.

A Massachusetts General Hospital resident in Boston was admitted on May 12, and “at the time of their admission, they were found to be highly suspicious,” Drs. Erica Shenoy, head of the hospital’s hospital management department, told reporters. Wednesday.

Hearing about mosquito bites in the U.K. encourage doctors to “think more about the patient’s diagnosis,” Shenoy said.

Hospital officials said they did not know of any cases in Canada and did not know where the resident had contracted the disease.

This comes after five gay men or lesbians in Portugal had a positive test in Spain investigating eight suspected cases of monkeys in men.

Monkeypox is a rare disease caused by the pox virus. The first human trial was recorded in the Democratic Republic of Congo in the 1970s.