Fifteen students from a local elementary school developed hepatitis A. The source of the infection was traced to a contaminated well that supplies drinking water to one of the school's three water fountains. This is an example of a
1. Common (point source) epidemic.
2. Propagated epidemic.
3. Vectorborne infection.
4. Zoonosis.
Question 2
Bobby Jones exposed all of the children in Miss Smith's kindergarten class to chickenpox in early February. By the end of April, more than 30 of the students in the school had come down with chickenpox. This is an example of a
1. Common (point source) epidemic.
2. Propagated outbreak.
3. Vectorborne infection.
4. Zoonosis.
Binary Head-Tail Source
Water vapor is supplied to the atmosphere by local evaporation or horizontal transport (advection).
Incidence of acute hepatitis B in the United States, 1980–2008.
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