We report multiple nontypeable genotype II noroviruses circulating in South America; nucleotides differed by >25% from those of other genotypes. These viruses have been circulating in the Americas for ≈20 years and show recombination with other genotypes. Clues to norovirus natural history can guide development of treatment and prevention plans.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6924879PMC
http://dx.doi.org/10.3201/eid2601.190626DOI Listing

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