The mpox virus is rare. Over the last few months there has been an increase in cases among people who have not traveled to areas where mpox was considered more common. Symptoms can include fever, swollen lymph nodes, and a rash. Currently, mpox seems to be most prevalent among men who have sex with other men. Most cases are mild and get better on their own. However, mpox can be very painful, and depending on where it appears and the extent, the rash can lead to permanent scarring. Learn more from Infectious Disease experts at Mount Sinai Health System.