Journal
NATURE ECOLOGY & EVOLUTION
Volume 6, Issue 10, Pages 1414-1422Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41559-022-01860-6
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Funding
- joint US-UK NIFA-NSF-NIH-BBSRC Ecology and Evolution of Infectious Disease [2019-67015-29918, BB/T004401/1]
- USDA National Institute of Food and Agriculture, Animal Health project [MINV-62-057]
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Interactions among co-circulating viral strains in host populations have significant implications for virus transmission dynamics and can be influenced by host immune responses and strain fitness. This review highlights the importance of studying multi-strain dynamics from ecological and evolutionary perspectives and provides an overview of the scales at which these dynamics occur. The review also summarizes various approaches, including immunological, phylogenetic, and mathematical modeling, used to quantify interactions among strains and explores the influence of host-pathogen interactions on pathogen coexistence. Outstanding questions and knowledge gaps in the field of multi-strain virus dynamics are discussed, with a focus on opportunities for future work.
Potential interactions among co-circulating viral strains in host populations are often overlooked in the study of virus transmission. However, these interactions probably shape transmission dynamics by influencing host immune responses or altering the relative fitness among co-circulating strains. In this Review, we describe multi-strain dynamics from ecological and evolutionary perspectives, outline scales in which multi-strain dynamics occur and summarize important immunological, phylogenetic and mathematical modelling approaches used to quantify interactions among strains. We also discuss how host-pathogen interactions influence the co-circulation of pathogens. Finally, we highlight outstanding questions and knowledge gaps in the current theory and study of ecological and evolutionary dynamics of multi-strain viruses. Many viruses evolve quickly, leading to the coexistence of multiple strains within the same host and population. In this Review, the authors synthesize ecological and evolutionary approaches to studying the dynamics of multi-strain RNA virus infections and suggest opportunities for future work.
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