Expansion of variant diversity associated with a high prevalence of pathogen strain superinfection under conditions of natural transmission.

Abstract excerpt

Superinfection occurs when a second, genetically distinct pathogen strain infects a host that has already mounted an immune response to a primary strain. For antigenically variant pathogens, the primary strain itself expresses a broad diversity of variants over time. Thus, successful superinfection would require that the secondary strain express a unique set of variants. We tested this hypothesis under conditions...

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