7 terrible diseases a simple handshake can give, and why washing hands immediately matters

These bacteria may not look dangerous, but they cause serious stomach troubles. When hands touch contaminated surfaces, like door handles, food, or even handshake contacts, the germs can enter the mouth. The result? Diarrhoea, cramps, nausea, and dehydration. Handwashing after every handshake, especially before meals, keeps these bacteria away.