Research your destination
People and animals in different parts of the world can carry diseases that are foreign to our bodies. Because of these differences, some countries require that people be vaccinated before they travel there so they will be immune to certain diseases. Find out which are needed for the countries you plan to visit through the Centers for Disease Control's Web site. Also check on those that are required to get back into the United States. If you have not already received one of the necessary vaccines, it's not recommended that you receive it during pregnancy.