Men and women tend to get different illnesses when traveling worldwide. Women are more prone to stomach problems like diarrhea and urinary tract infections, while men have higher risks of fevers from mosquito-borne diseases like malaria and dengue, as well as sexually transmitted diseases. Researchers believe men may attract more mosquitoes due to sweating, washing off insect repellent, while women could be more susceptible to or more likely to seek treatment for gastrointestinal issues.