Mpox, also known as monkeypox, was first identified by scientists in 1958 when there were outbreaks of a "pox-like" disease in monkeys.
The Chicago Department of Public Health is offering monkeypox and COVID vaccines at two City College locations Saturday.
Northern Illinois University reported its first case of monkeypox Friday.
The dog tested positive for monkeypox 12 days after sleeping in the same bed as the owners who were infected with the virus.
The outbreak has mostly affected men who identify as gay, bisexual or other men who have sex with men, although the CDC has warned it is not a sexually transmitted disease and anyone is at risk of infection.
There's a Cook County Health and Hospitals Committee hearing Monday on the response to the monkeypox outbreak.