Multiple Choice
Review the following graph. What is the incidence of varicella (chickenpox) trend from 1990 to 2014 in these four states?
Varicella incidence per 100,000 population in states that have reported varicella cases to CDC annually since before implementation of the varicella vaccination program - Illinois, Michigan, Texas, and West Virginia, 1990-2014.
Source: Lopez AS, Zhang J, Marin M. Epidemiology of Varicella During the 2-Dose Varicella Vaccination Program - United States, 2005-2014. MMWR Morb Mortal Wkly Rep 2016; 65:902-905. DOI: http://dx.doi.org/10.15585/mmwr.mm6534a4.
A) downward
B) upward
C) flat
D) mixed
Correct Answer:

Verified
Correct Answer:
Verified
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