Cruise lines have begun waiving cancellation penalties for some customers booked on voyages to the Caribbean and other regions affected by the Zika virus.
Industry giant Carnival Cruise Lines said it will allow pregnant women on sailings that include stops in the US Virgin Islands, Puerto Rico and other destinations impacted by the virus to switch to an itinerary to an unaffected area.
Alternately, passengers can postpone their trip or cancel outright and receive a future cruise credit.
Norwegian Cruise Line also is allowing pregnant women sailing to affected areas to postpone trips to a later date or switch itineraries, and Royal Caribbean is also giving pregnant women alternative options.
The cruise lines said the options also are being offered to people traveling with the pregnant passenger.
US health officials said that while posing little risk to most people, the Zika virus is particularly dangerous for pregnant women.
They have cited a link to microcephaly, a birth defect in which infants are born with small skulls and incomplete brain development.
Last week, the US Centers for Disease Control and Prevention expanded a Zika-related travel alert to include the US Virgin Islands and the Dominican Republic.
Earlier, the CDC had issued travel alert for Barbados, Guadeloupe, Haiti, Martinique, Puerto Rico and St Martin. The alert recommends pregnant women to postpone travel to those destinations.
Also included in the CDC alert are Bolivia; Brazil; Cape Verde; Colombia; Ecuador; El Salvador; French Guiana; Guatemala; Guyana; Honduras; Mexico; Panama; Paraguay; Samoa; Suriname and Venezuela.