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Science. 2015 May 8;348(6235):694-9. doi: 10.1126/science.aaa3662. Epub 2015 May 7.

Long-term measles-induced immunomodulation increases overall childhood infectious disease mortality.

Author information

1
Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA. Medical Scientist Training Program, School of Medicine, Emory University, Atlanta, GA, USA. michael.j.mina@gmail.com.
2
Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA. Fogarty International Center, National Institutes of Health, Bethesda, MD, USA.
3
Department of Viroscience, Erasmus University Medical Center, Rotterdam, Netherlands.

Abstract

Immunosuppression after measles is known to predispose people to opportunistic infections for a period of several weeks to months. Using population-level data, we show that measles has a more prolonged effect on host resistance, extending over 2 to 3 years. We find that nonmeasles infectious disease mortality in high-income countries is tightly coupled to measles incidence at this lag, in both the pre- and post-vaccine eras. We conclude that long-term immunologic sequelae of measles drive interannual fluctuations in nonmeasles deaths. This is consistent with recent experimental work that attributes the immunosuppressive effects of measles to depletion of B and T lymphocytes. Our data provide an explanation for the long-term benefits of measles vaccination in preventing all-cause infectious disease. By preventing measles-associated immune memory loss, vaccination protects polymicrobial herd immunity.

Comment in

PMID:
25954009
PMCID:
PMC4823017
DOI:
10.1126/science.aaa3662
[Indexed for MEDLINE]
Free PMC Article

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