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Volume 30, Number 11—November 2024
Research

Estimating Influenza Illnesses Averted by Year-Round and Seasonal Campaign Vaccination for Young Children, Kenya

Radhika Gharpure, Young M. Yoo, Ben Andagalu, Stefano Tempia, Sergio Loayza, Chiedza Machingaidze, Bryan O. Nyawanda, Jeanette Dawa, Eric Osoro, Rose Jalang’o, Kathryn E. Lafond, Melissa A. Rolfes, and Gideon O. EmukuleComments to Author 
Author affiliation: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (R. Gharpure, Y.M. Yoo, B. Andagalu, K.E. Lafond, M.A. Rolfes, G.O. Emukule); Centers for Disease Control and Prevention, Nairobi, Kenya (B. Andagalu, G.O. Emukule); World Health Organization, Geneva, Switzerland (S. Tempia, C. Machingaidze, M.A. Rolfes); Pan American Health Organization, Washington, DC, USA (S. Loayza); Kenya Medical Research Institute, Kisumu, Kenya (B.O. Nyawanda); Washington State University Global Health Kenya, Nairobi (J. Dawa, E. Osoro); Washington State University, Pullman, Washington, USA (E. Osoro); Ministry of Health, Nairobi (R. Jalang’o)

Main Article

Table 2

Estimated influenza illnesses averted through influenza vaccination for children 6–23 mo of age in the introduction year (base scenario), Kenya*

Vaccination strategy Prevented fraction Hospitalizations averted Outpatient visits averted Medically attended illnesses averted Total illnesses averted
Year-round vaccination, April start
13.2
(10.9–15.7)
 349 
(286–416)
 3,101
(2,456–3,846)
 3,450
(2,751–4,251)
 7,202
(5,898–8,616)
Year-round vaccination, October start
11.7
(9.6–13.9)
 311 
(254–371)
 2,754
(2,173–3,414)
 3,066
(2,431–3,769)
 6,410
(5,218–7,692)
Seasonal campaign vaccination, Apr–Jul
 21.2
(16.9–26.3)
 562 
(448–695)
 4,988
(3,828–6,391)
 5,546
(4,287–7,090)
 11,612
(9,220–14,478)
Seasonal campaign vaccination, Oct–Jan 18.7
(14.9–23.3) 497 
(394–621) 4,399
(3,377–5,684) 4,894
(3,787–6,286) 10,236
(8,082–12,837)

*Values are estimated no. (95% CI) except for prevented fraction, which was defined as the number of illnesses averted by vaccination divided by the number of illnesses in the absence of vaccine.

Main Article

Page created: October 07, 2024
Page updated: October 22, 2024
Page reviewed: October 22, 2024
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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