The long-term outlook for the Americas resulting from the Zika virus outbreak is uncertain and the number of people affected is difficult to gauge, but the Pan American Health Organization is responding with a strong, four-tiered strategy to support its countries, according to Dr. Sylvain Aldighieri, PAHO’s incident manager for Zika.

In a briefing to members of PAHO’s Executive Committee, which met this week, Aldighieri said that PAHO has sent 88 experts on 53 missions to countries and territories, focusing on priority areas of detection, prevention, response and research in Zika.

He said much work remains to be done in research to define the absolute risk for congenital malformations and to describe the clinical spectrum of Zika congenital infections.

PAHO Director Dr. Carissa F. Etienne assured members of the committee that PAHO will continue to provide leadership and coordination of the Zika response.

“Our challenge will continue in the medium and long-term on Zika. Aedes aegypti is a very elusive vector with high infestation rates, but we are fully committed to our Member States as far as Zika is concerned,” she said.