We tested 210 dengue virus‒negative samples collected from febrile patients during a dengue virus type 4 outbreak in Rio de Janeiro in April 2013 and found 3 samples positive for Zika virus. Our findings support previously published entomological data suggesting Zika virus was introduced into Brazil during October 2012-May 2013.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5708232 | PMC |
| http://dx.doi.org/10.3201/eid2312.171375 | DOI Listing |
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