Then, in May 2015, researchers from the Federal University of Bahia and the Evandro Chagas Institute determined, using the RT-PCR technique, that the illness was an outbreak of Zika virus.
Kemudian, pada Mei 2015, peneliti dari Universitas Federal Bahia dan Evandro Chagas Institute ditentukan, menggunakan teknik RT-PCR, bahwa penyakit itu wabah virus Zika.