<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).
Shaking hands or tremor and Trembling. WebMD Symptom Checker helps you find the most common medical conditions indicated by the symptoms shaking hands or tremor and trembling including Low blood sugar (hypoglycemia), Acute stress reaction, and Benign essential tremor. There are 11 conditions associated with shaking hands or tremor and trembling.