Delta CEO-designate: Zika has not impacted flight bookings

"Candidly, it would be hard to see much change," given that Delta's unit revenue to Brazil has already fallen sharply because of the country's economic slowdown, said Ed Bastian, set to become the carrier's new chief executive in May. The World Health Organization, citing strong suspicions of a link between the mosquito-borne virus and thousands of cases in Brazil of babies born with abnormally small heads, declared a global health emergency on Monday.