<a href=https://explorable.com/cause-and-effect>Establishing Cause and Effect</a>. Cause and effect is one of the most commonly misunderstood concepts in science and is often misused by lawyers, the media, politicians and even scientists themselves, in an attempt to add legitimacy to research.
You can't catch cancer from anyone, in any way. Cancer is not contagious. You can't catch HIV/AIDS just by touching somebody. The AIDS virus is not found in sweat. Yes, you can catch a cold, or the flu by shaking hands with someone if you then put your hands on/near a mucous membrane (eyes, nose, mouth).
Credit: BSIP/UIG Universal Images Group Getty Images. Some of the conditions that WebMD names, such as toxic shock syndrome and cat-scratch disease, have a clear connection to body shaking. However, some of the other conditions, such as lupus, endocarditis and porphyria, may come as more of a surprise. The site also mentions lyme disease, hypothyroidism in adults, bird flu, west Nile virus, ricin poisoning and tick bites as potential causes of body shaking.