In a follow-up on the mumps outbreak in Toronto, city health officials report four additional cases since the outbreak was first reported approximately one week ago.


Currently, there have been 18 confirmed cases of mumps in Toronto in 2017, as of Mar. 1, according to Toronto Public Health.

The outbreak is primarily affecting young adults, 18 to 35 years of age. Earlier reports on the investigation note that many of these cases have frequented bars in the west downtown core of Toronto.

The mumps virus is found in saliva and respiratory droplets. It is spread from person to person through coughing, sneezing, and coming into contact with a person’s saliva by sharing drinks or utensils, food or water bottles, or by kissing. A major factor contributing to outbreaks is being in a crowded environment, such as attending the same class, playing on the same sports team or living in a dormitory with a person who has the mumps.