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Volume 20, Number 10—October 2014
Dispatch

Differences in Influenza Seasonality by Latitude, Northern India

Parvaiz A. Koul1Comments to Author , Shobha Broor12, Siddhartha Saha, John Barnes, Catherine Smith, Michael Shaw, Mandeep Chadha, and Renu B. Lal
Author affiliations: Sheri-Kashmir Institute of Medical Sciences, Srinagar, India (P.A. Koul); All India Institute of Medical Sciences, New Delhi, India (S. Broor); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (S. Saha, J. Barnes, C. Smith, M. Shaw, R.B. Lal); National Institute of Virology, Pune, India (M. Chadha)

Main Article

Table

Influenza surveillance, Srinagar and Delhi, India, 2011–2012

City No. (%) persons
2011 2012 Total
Srinagar (34.09°N)
Tested 768 1,371 2,139
Influenza positive 162 (21) 215 (15.7) 377 (17.6)
Influenza type*
A(H1N1)pdm09 95 (58.6) 57 (26.5) 152 (40.3)
A(H3N2) 38 (23.5) 85 (39.5) 123 (32.6)
B
 29 (17.9)
 73 (34.0)
 102 (27.1)
New Delhi (28.66°N)
Tested 1,007 1,519 2,526
Influenza positive 74 (7.3) 165 (10.8) 239 (9.46)
Influenza type*
A(H1N1)pdm09 3 (4.1) 44 (26.7) 47 (19.7)
A(H3N2) 38 (51.4) 0 38 (15.9)
B 33 (44.6) 121 (73.3) 154 (64.4)

*Percentages are of all influenza-positive test results in category.

Main Article

1These authors contributed equally to this article.

2Current affiliation: INCLEN Foundation, New Delhi, India.

Page created: September 22, 2014
Page updated: September 22, 2014
Page reviewed: September 22, 2014
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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