Influenza Strains

Cross-protection explains single influenza illness peaks in temperate climates

Published in Blood Weekly, August 26th, 2004

Cross-protection explains single influenza illness peaks in temperate climates.

"Almost all influenza surveillance systems of temperate countries report a single influenza illness peak each winter. Although several strains of different types or subtypes may co-circulate, they exceptionally lead to two distinct illness peaks during the same winter.

"We hypothesize that cross-protection between the different strains can, by itself, explain this absence of succeeding illness peaks," scientists in Chile report.

"We used a dynamic population model to describe the spread of two influenza strains during one season. Cross-protection is...

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Source: Blood Weekly (2004-08-26)

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