Massachusetts has reported a case of monkeypox in a man who recently traveled to Canada
Monkeypox is typically limited to Africa, and rare cases in the U.S. and elsewhere are usually linked to travel there. A small number of confirmed or suspected cases have been reported this month in the United Kingdom, Portugal and Spain.
The case is the first in the U.S. this year. Last year, Texas and Maryland each reported a case in people who traveled to Nigeria.
Monkeypox typically begins with a flu-like illness and swelling of the lymph nodes, followed by a rash on the face and body. In Africa, people have been infected through bites from rodents or small animals, and it does not usually spread easily among people.
However, investigators in Europe say most of the cases have been in gay or bisexual men, and officials are looking into the possibility that some infections were spread through close contact during sex.
Monkeypox comes from the same family of viruses as smallpox. Most people recover from monkeypox within weeks, but the disease is fatal for up to 1 in 10 people, according to the World Health Organization.
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