Travelers' diarrhea can be caused by viruses, bacteria, or parasites, which are found throughout the region and can contaminate food or water. Make sure your food and drinking water are safe.
Malaria is a preventable infection that can be fatal if left untreated.
In Argentina, you are at risk for malaria only in northern rural areas bordering Bolivia and Paraguay. In Chile, the Falkland Islands, and Uruguay, there is no risk for malaria. Travelers to rural northern Argentina should take chloroquine to prevent malaria. A certificate of yellow fever vaccination is not required for entry into the countries in this region. If you visit the Andes Mountains, ascend gradually to allow time for your body to adjust to the high altitude, which can cause insomnia, headaches, nausea, and altitude sickness.