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 Perspective

Seasonal Variation in Host Susceptibility and Cycles of Certain Infectious Diseases

Scott F. Dowell
Centers for Disease Control and Prevention, Atlanta, Georgia, USA

Figure 1. Seasonal variation in the occurrence of three human pathogens in the United States. A: an annual cycle of rubella activity was maintained between larger epidemics, which occurred every 6 to 9 years. B: the percentage of specimens testing positive for influenza viruses among specimens tested by World Health Organization and U.S. National Respiratory and Enteric Virus Surveillance System collaborating laboratories. C: a consistent pattern of rotavirus seasonality is evident in the U.S. National Respiratory and Enteric Virus Surveillance System. Adapted from references 4-6.

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Figure 1. Seasonal variation in the occurrence of three human pathogens in the United States. A: an annual cycle of rubella activity was maintained between larger epidemics, which occurred every 6 to 9 years. B: the percentage of specimens testing positive for influenza viruses among specimens tested by World Health Organization and U.S. National Respiratory and Enteric Virus Surveillance System collaborating laboratories. C: a consistent pattern of rotavirus seasonality is evident in the U.S. National Respiratory and Enteric Virus Surveillance System. Adapted from references 4-6.
 


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This page last reviewed May 19, 2001

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National Center for Infectious Diseases
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