California, the nation's most populous state, has confirmed 827 monkeypox cases as of Monday, the second-largest state tally after the 1390 infections documented in New York, according to the US Centres for Disease Control and Prevention.
The first case of monkeypox in the United States was confirmed in Massachusetts on 20 May, with the first case in California, in a person who had travelled abroad, confirmed five days later.
Monkeypox, which spreads through close physical contact, tends to cause flu-like symptoms and pus-filled skin lesions, though it is rarely fatal.