Question

1. Between December 15, 1987, and March 10, 1988, a total of 84 measles cases in five generations of measles transmission occurred among Fort Lewis College students in Durango, CO.

a. Using the information in the table, draw an epi curve in the space below to represent this this outbreak. Label axes (with the proper units) and give the graph a title. Measles has an average incubation period of 14 days (range 7-21 days)

b. Describe the shape of this curve. What does this shape imply about the source of the outbreak?

c. The school was placed on a measles “alert” on January 9^th. However, new cases continued to occur into the beginning of March despite measures to prevent spread of measles. After the beginning of March, disease transmission stopped. What event occurs at the beginning of March at Universities nation-wide and why did this finally help stop the transmission of the disease?

Number of cases	Date of rash onset
1	Week of December 19th
2	Week of January 9th
37	Week of January 23rd
13	Week of January 30th
15	Week of February 6th
9	Week of February 13th
6	Week of February 20th
1	Week of February 27th
0	Week of March 5th

Answer 1

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