EPIDEMIOLOGY: You are an epidemiologist employed by the state of Ohio . There ha
ID: 67663 • Letter: E
Question
EPIDEMIOLOGY:
You are an epidemiologist employed by the state of Ohio. There has been a mumps outbreak on a college campus. The index patient is thought to have been exposed while attending a football game in another state. After returning to college and before exhibiting symptoms, the patient attended a campus function, which included more than 300 attendees. The student also lived in a fraternity house with 7 other students. About three weeks after the student became ill, 6 other students were diagnosed with mumps as well. Over the following few weeks, an additional 4 people were diagnosed with the mumps before the spread was stopped.
What is the R0for mumps in this scenario?_____________.
Explanation / Answer
R0 for mumps in this scenario:
The pre-vaccination patterns of infection for measles, mumps and rubella are collated from a number of European countries in order to compare the epidemiology of the three viruses.
Mumps is spread from person to person through contact with respiratory secretions, such as saliva from an infected person. When an infected person coughs or sneezes, the droplets aerosolize and can enter the eyes, nose, or mouth of another person. Mumps can also be spread by sharing food and drinks. The virus can also survive on surfaces and then be spread after contact in a similar manner. A person infected with mumps is contagious from approximately 7 days before the onset of symptoms until about 8 days after symptoms start.The incubation period (time until symptoms begin) can be from 12–25 days, but is typically 16–18 days.20-40% of persons infected with the mumps virus do not show symptoms, so it is possible to be infected and spread the virus without knowing it.
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