Cases had been recorded in every state except Wyoming as of Thursday, according to the Centers for Disease Control and Prevention. That’s up from 44 states and Washington, D.C., at the end of July and from 14 states and Washington, D.C., at the beginning of June.
In total, the U.S. has reported more than 10,000 cases since the beginning of May. The total worldwide exceeds 31,000.
According to an NBC News analysis of CDC data, the seven-day average of reported new cases increased from an average of 338 on July 27 to an average of 528 on Aug. 10.
The virus is transmitted primarily through close physical contact. Recent cases are mostly among among men who have sex with men.
The World Health Organization declared the outbreak a public health emergency in July. In the last two weeks, California, Illinois and New York state have issued emergency declarations over the continued spread of monkeypox.
Dana Varinsky contributed.