Describe and analyze a typical measles outbreak

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Reference no: EM131094017

Individual Assignment

The purpose of this assignment is to get some experience describing and analyzing a typical measles outbreak. Here is the scenario: You are an epidemiologist with the state immunization program. Your Division Director wants information on a recent measles outbreak. In particular, this outbreak has been in the news and your Director wants an analysis so he can respond to questions (eg "how come a third of the cases are in vaccinated persons - does the vaccine work?"). The template attached is a very typical example of how you might respond to this request. Fill in the rest of the template including:

• a graph representing the epidemiological curve of the outbreak,
• a narrative description of the salient features of the outbreak and the epi curve,
• an analysis of vaccine efficacy (including a calculation of vaccine efficacy for this outbreak), and
• a list of conclusions and recommendations for your Director based on your description and analyses.

The results of the case and contact investigations are below:

Case investigation:

A pediatrician had evaluated a 10-year-old child in the emergency department on May 10th, 2016 who was suspected to have Kawasaki disease. The child had arrived from India on May 8th and had developed a rash on May 9th. A review of medical records led the investigators to reconsider the rash illness in the 10-year-old child as a possible measles case following the laboratory confirmation of measles by IgM testing.

A total of 108 contacts were identified as exposed to the index case or to the siblings. Of the 108, 100 were vaccinated and 7 were unvaccinated. A total of twelve measles cases were diagnosed in this outbreak. All cases are summarized in the table below.

Case Description

Age

Onset date

Vaccination h/o

Lab Confirmed y/n

Index

10

09-May

no vaccine

y

sibling 1

7

23-May

no vaccine

y

sibling 2

9

26-May

no vaccine

n

father

34

26-May

1 MMR (no record)

y

contact - index

12 mo

27-May

no vaccine

y

pediatrician

51

28-May

3 MMRs

y

contact - siblings

47

03-Jun

1 MMR (no record)

y

contact - siblings

8

04-Jun

no vaccine

y

contact - siblings

7

05-Jun

no vaccine

y

contact - siblings

9

05-Jun

no vaccine

y

contact - siblings

10

06-Jun

2 MMRs

y

Reference no: EM131094017

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