There is a mumps outbreak here in Washington State, as well as various other outbreaks across the nation. The CDC reports that mumps infections are currently at a 10-year high. This post is a quick update on the outbreak and why they occur, an explanation about the mumps virus, the infection and symptoms that are typical, and what parents should know now to avoid mumps.
Mumps Outbreaks In 2016
- Numbers This Year: For the calendar year 2016 through early December, 46 states and the District of Columbia have reported a total of 4,528 mumps infections — well more than double the mumps cases reported in 2015 and creeping up in ways similar to 2006 when we had the last big mumps year. That outbreak was primarily housed in the midwest among college students.
- Mumps In College Students: In general, we often hear more about outbreaks on college campuses in part because of students living in close quarters. Mumps is easily spread when those are in close contact who share cups, talk closely together and share respiratory droplets more readily. The intensity of these environments allows mumps to spread more rapidly and it’s also possible that during college some students have lost immunity from the vaccine they received as a child. In general college students are at higher risk because of how they relate. I love how CDC details the conditions, “certain behaviors that result in exchanging saliva, such as kissing or sharing utensils, cups, lipstick or cigarettes, might increase spread of the virus.”
- Washington State Outbreak: As of 12/23/16 there have been 101 cases in King County (cases updated here by the Public Health Dept). In total, 32 cases are confirmed and 69 probable with additional cases under investigation. The majority of cases are in children under age 18. Some 65% of those cases are in people who are reported as up-to-date on Measles Mumps & Rubella (MMR) vaccine. This occurs in part because although the MMR vaccine works well, it still will leave some vulnerable to an infection if exposed. The MMR vaccine provides protection against mumps to about 88% of us after we get two shots, so it consequently leaves more than 1 in 10 of us vulnerable during outbreaks. We typically don’t know who is in that 12% so during outbreaks we make sure students are up-to-date in immunizations and those with suspicious symptoms are seen, diagnosed, and while infectious, they stay home.
- Schools Send Children Home If No MMR Shots: The outbreak has been of big enough concern that The Auburn School District told more than 200 non-immunized students to stay home so they wouldn’t get the virus and go on to infect others. Public health officials sent letters to the students’ homes saying kids would only be allowed back once they had proof they’ve received the MMR vaccine. Otherwise, the students will be kept from school for at least 25 days after the last mumps case in the Auburn district.