Some airlines, cruise lines and other travel companies are offering travelers concerned about the Zika virus refunds or the opportunity to reschedule.

The mosquito-borne Zika virus has now spread to roughly two dozen countries. For most people the disease is usually mild, with symptoms like fever, rash, joint pain and red eyes. But it is of particular concern to pregnant women as it may cause brain damage in babies, and in rare cases may also lead to Guillain-Barre syndrome, which may cause paralysis in some people.

Related: Where are you most likely to get Zika virus, and what are long-term effects?

To protect American travelers from the virus, the Centers for Disease Control and Prevention has issued a travel alert that recommends travelers take “enhanced precautions” — including trying to prevent mosquito bites by covering exposed skin, using insect repellent and more — when traveling to some areas in the Caribbean, Mexico, central and South America and more.

While the organization isn’t saying that you should avoid travel to these regions (though it does say that pregnant women should postpone travel if they can), some travelers are undoubtedly too scared to go to impacted areas. If you fall in that category, some airlines, cruise lines and others are stepping up to offer refunds or complimentary reschedulings.

Airlines

Both United Airlines UAL, -3.61% and JetBlue JBLU, -2.01% say they will let people flying to the impacted areas rebook their flight for a later date or get a refund. American Airlines AAL, -3.22% will give customers refunds if they provide a doctor’s note that says they are unable to travel to one of these countries: Brazil, Colombia, El Salvador, Guatemala, Haiti, Honduras, Martinique, Mexico, Panama, Puerto Rico or Venezuela. . And Delta says that travelers may qualify for a change to alternate destinations, travel dates or a refund, and that customers may make fee-waived changes to future reservations and tickets if they do it by Feb. 29, 2016.

Southwest LUV, -1.41% reiterates its current policies noting that “as always, Southwest customers can change their travel itineraries without a change fee, and even our most restrictive, non-refundable fares can be fully applied toward future travel as long as the reservation is canceled 10 minutes prior to the scheduled departure of their flight.”

Delta DAL, -3.29% and Airlines for America, the trade organization representing the industry, did not respond to our request for comment.

What Is the Zika Virus?

Cruise lines

Norwegian NCLH, -5.85% says it will allow pregnant women to reschedule their cruise for a future date or to change their itinerary to an area that isn’t impacted by the Zika virus. Carnival CCL, -5.72% says that pregnant women who need to cancel their cruise will get a credit for a future cruise. Royal Caribbean RCL, -4.80% notes that it will provide pregnant women with alternate itinerary options, which may include giving guests a future cruise credit valid for two years.

Furthermore, the Cruise Lines International Association, an association representing the cruise lines, says that the cruise lines are “in close contact with public health authorities regarding Zika virus” and that the recommended repellent is available onboard the ships.

CDC

Hotels

Hilton HLT, -1.67% says that it is considering cancellation waivers for those traveling to impacted areas on “a case-by-case basis” (guests can call 1-800-HILTONS to find out if they might qualify). Marriott MAR, -4.33% — which also owns the Ritz Carlton — has not responded to our request for comment.

Because many hotels have a 24-hour cancellation policy, worried travelers may have an easier time canceling their rooms than any other part of their trip. And a statement by the Caribbean Hotel and Tourism Association (in conjunction with the Caribbean Tourism Organization) says that they are in “close contact” with the Caribbean Public Health Agency so that they can “communicate prevention and control measures” to visitors.

Despite the scary headlines, travel agents and companies say that they haven’t yet had many cancellations or rebooking requests. Cruise line Norwegian notes that they have only had one guest cancel a cruise and none request to change itineraries. And Kathy Gerhardt, a spokesperson for the Travel Leaders Group, which represents more than 40,000 travel agents, says that they’ve only heard about a couple of their clients changing plans so far.

If you’re worried about the virus spreading and having to cancel a future trip, you may want to consider some types of travel insurance. Connie Miller, the sales and marketing director at Travel Leaders in Omaha, says that one of her pregnant clients purchased “cancel for any reason” travel insurance, which (just as it sounds) allows her to cancel her trip for any reason (provided she does it within a certain window of time, usually). Though that type of policy is more expensive than trip cancellation insurance, it may be better for those concerned about the Zika virus, since trip cancellation insurance may not cover a CDC travel alert such as the one issued now.

We will continue to update this story as news of more policies come to light.