Did the soldiers of World War 2 suffer any illnesses?

American soldiers were like pincushions from the vaccinations and inoculations they received before going overseas.

Still, almost every man sent to the Pacific caught malaria from the mosquitoes. Some people never get malaria completely out of their system and have recurring bouts for the rest of their lives. Other tropical diseases, such as dengue fever, were also impossible to prevent. US troops had an anti-malarial drug, Atabrine, they were supposed to take. Most hated it because it turned men a violent yellow color if they took it. I don't know how well it worked, but apparently not too well, given the number of malaria sufferers who returned.

In Europe, the winter of 1944-45 was the coldest in Europe in one hundred years. The combat troops were living in holes in the ground, never warm, never dry. They got frostbite, frozen feet, trench foot, and pneumonia.