A doctor examines a larva of the Aedes aegypti mosquito, the carrier of Zika virus, in a laboratory of the Ministry of Health, in San Jose, Costa Rica, on Jan. 29, 2016. The World Health Organization (WHO) on Thursday said it would convene an International Health Regulations emergency committee on the Zika virus to ascertain whether the outbreak constitutes a public health emergency of international concern.(Xinhua/Kent Gilbert) (jp) (sp)