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Sunlight and Protection Against Influenza

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  • Slusky, David

    (University of Kansas)

  • Zeckhauser, Richard J.

    (Harvard University)

Abstract

Recent medical literature suggests that vitamin D supplementation protects against acute respiratory tract infection. Humans exposed to sunlight produce vitamin D directly. This paper investigates how differences in sunlight, as measured over several years across states and during the same calendar week, affect influenza incidence. We find that sunlight strongly protects against getting influenza. This relationship is driven almost entirely by the severe H1N1 epidemic in fall 2009. A 10% increase in relative sunlight decreases the influenza index in September or October by 1.1 points on a 10-point scale. A second, complementary study employs a separate data set to study flu incidence in counties in New York State. The results are strongly in accord.

Suggested Citation

  • Slusky, David & Zeckhauser, Richard J., 2020. "Sunlight and Protection Against Influenza," IZA Discussion Papers 13469, Institute of Labor Economics (IZA).
    • Handle: RePEc:iza:izadps:dp13469
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    References listed on IDEAS

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    Cited by:

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    2. Guidetti, Bruna & Pereda, Paula & Severnini, Edson R., 2020. "Health Shocks under Hospital Capacity Constraint: Evidence from Air Pollution in Sao Paulo, Brazil," IZA Discussion Papers 13211, Institute of Labor Economics (IZA).
    3. Zhang, Xin & Wang, Yixuan & Chen, Xi & Zhang, Xun, 2019. "Prenatal Sunshine Exposure and Birth Outcomes in China," IZA Discussion Papers 12877, Institute of Labor Economics (IZA).
    4. Yun Qiu & Xi Chen & Wei Shi, 2020. "Impacts of social and economic factors on the transmission of coronavirus disease 2019 (COVID-19) in China," Journal of Population Economics, Springer;European Society for Population Economics, vol. 33(4), pages 1127-1172, October.
    5. Corey White, 2021. "Measuring Social and Externality Benefits of Influenza Vaccination," Journal of Human Resources, University of Wisconsin Press, vol. 56(3), pages 749-785.
    6. Alexander Ahammer & Martin Halla & Mario Lackner, 2023. "Mass gatherings contributed to early COVID‐19 mortality: Evidence from US sports," Contemporary Economic Policy, Western Economic Association International, vol. 41(3), pages 471-488, July.
    7. Bruna Morais Guidetti & Paula Carvalho Pereda, Edson Roberto Severnini, 2021. "Health Shocks under Hospital Capacity Constraints: Evidence from Air Pollution in São Paulo, Brazil," Working Papers, Department of Economics 2021_05, University of São Paulo (FEA-USP).
    8. Amanda Guimbeau & Nidhiya Menon & Aldo Musacchio, 2022. "Short‐ and medium‐run health and literacy impacts of the 1918 Spanish Flu pandemic in Brazil," Economic History Review, Economic History Society, vol. 75(4), pages 997-1025, November.
    9. Hou, Wenxuan & Li, Mao & Main, Brian G.M. & Liu, Xiaofan, 2023. "Pandemics and financial development: A lesson from the 1918 influenza pandemic," Journal of Corporate Finance, Elsevier, vol. 83(C).
    10. Amanda Guimbeau & Nidhiya Menon & Aldo Musacchio, 2020. "The Brazilian Bombshell? The Long-Term Impact of the 1918 Influenza Pandemic the South American Way," NBER Working Papers 26929, National Bureau of Economic Research, Inc.
    11. De Obesso Arias, María de las Mercedes & Pérez Rivero, Carlos Alberto & Carrero Márquez, Oliver, 2023. "Artificial intelligence to manage workplace bullying," Journal of Business Research, Elsevier, vol. 160(C).
    12. Conway, Karen Smith & Trudeau, Jennifer, 2019. "Sunshine, fertility and racial disparities," Economics & Human Biology, Elsevier, vol. 32(C), pages 18-39.

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    More about this item

    Keywords

    Seasonal Influenza; sunlight; vitamin d; natural experiment; H1N1;
    All these keywords.

    JEL classification:

    • I10 - Health, Education, and Welfare - - Health - - - General
    • I12 - Health, Education, and Welfare - - Health - - - Health Behavior
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health
    • Q5 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics
    • N32 - Economic History - - Labor and Consumers, Demography, Education, Health, Welfare, Income, Wealth, Religion, and Philanthropy - - - U.S.; Canada: 1913-

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