Health officials issued an advisory after a severe strain of mpox was detected in New York City.

The Clade I case involves an individual who recently traveled outside of the United States.

The NYC Health Department urges individuals who “have sex with men and identify as male, trans, nonbinary, genderqueer or gender nonconforming” to get vaccinated.

Health Commissioner Dr. Alister Martin says there isn’t any known local transmission of mpox Clade I in the five boroughs and the risk remains low for residents overall.

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