Delta issued a travel advisory for customers Wednesday who might be concerned with travel to destinations affected by the Zika virus.

It reads: “Customers with current reservations who are concerned about travelling to destinations reported by the CDC to be affected by Zika Viral Illness should call 1-800-221-1212 (U.S.) or your local Reservations office and speak with a Delta Representative. Customers may qualify for a change to alternate destinations, travel dates or a refund. Customers may make fee-waived changes to future reservations/tickets. However, changes need to be made by February 29, 2016.”

Reservation Sales issued bulletins and communications to its specialists to inform them of the options for customers who call.

Delta’s Air Crew and Passenger Health Services team continues to be in close contact with the U.S. Centers for Disease Control and other organizations about Zika Viral Illness.