While not all cases have been confirmed to be monkeypox, they are presumed to be until proven otherwise. As of May 31, nine states - California, Colorado, Florida, Georgia, Massachusetts, New York, Utah, Virginia, and Washington - have reported 17 patients with confirmed infections of orthopoxvirus, the family of viruses that encompasses monkeypox and smallpox. The current tally is eight more than last week. The Centers for Disease Control and Prevention has identified 17 cases of monkeypox in the United States as of May 31, with most cases occurring in gay and bisexual men.