Corrected on May 18, 2022
An earlier version of this story said a monkeypox case had been reported in the U.S., while later saying there were no cases in the United States. To date, one U.S. case has been reported. We have deleted the sentence saying there were no cases, which was from a version of the story that was published before the U.S. case was reported.
Additionally, an earlier version of this story said scientists don't know if the rate of monkeypox transmission has increased, followed by a sentence that said enhanced transmission is one reason that the current outbreak appears to have spread through the community in three cities. To clarify, scientists don't know if the transmission rate has increased; if it has, that could be one reason the outbreak appears to have spread through the community in the three cities.
An earlier version of this story mistakenly said Angie Rasmussen's tweet was on Tuesday; it was on Monday, May 16.