The article discusses the global impact of the mosquito-borne Zika virus as of 2016, and it mentions fear involving pregnant women in places such as the U.S. Birth defects such as microcephaly are addressed, along with the work of neurologist Dr. Vanessa Van Der Linden in Recife, Brazil. The World Health Organization's declaration of a Zika-related international public-health emergency is mentioned, along with the transmission of the Zika virus in places such as Latin America.