2014Emerging infectious diseasesOpen access

Differences in Influenza Seasonality by Latitude, Northern India

Parvaiz A Koul, Shobha Broor, Siddhartha Saha, John Barnes, Catherine M. Smith, Michael W. Shaw, Mandeep Chadha, Renu B. Lal

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Abstract

The seasonality of influenza in the tropics complicates vaccination timing. We investigated influenza seasonality in northern India and found influenza positivity peaked in Srinagar (34.09°N) in January-March but peaked in New Delhi (28.66°N) in July-September. Srinagar should consider influenza vaccination in October-November, but New Delhi should vaccinate in May-June.

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The seasonality of influenza in the tropics complicates vaccination timing. We investigated influenza seasonality in northern India and found influenza positivity peaked in Srinagar (34.09°N) in January-March but peaked in New Delhi (28.66°N) in July-September. Srinagar should consider influenza vaccination in October-November, but New Delhi should vaccinate in May-June.

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Available abstract

The seasonality of influenza in the tropics complicates vaccination timing. We investigated influenza seasonality in northern India and found influenza positivity peaked in Srinagar (34.09°N) in January-March but peaked in New Delhi (28.66°N) in July-September. Srinagar should consider influenza vaccination in October-November, but New Delhi should vaccinate in May-June.

Key concepts: Seasonality, Seasonal influenza, New delhi, Vaccination, Geography, Tropics, Latitude, Veterinary medicine

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