Since chikungunya virus (CHIKV) was introduced into the Americas in 2013, its geographic distribution has rapidly expanded. Of 119 serum samples collected in 2014 from febrile patients in southern Mexico, 79% were positive for CHIKV or IgM against CHIKV. Sequencing results confirmed CHIKV strains closely related to Caribbean isolates.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4622247PMC
http://dx.doi.org/10.3201/eid2111.150546DOI Listing

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