<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).
Here are a few causes of shaky hands that might be afflicting you. Note: Shaking hands are technically known as 'tremors' and are likely to not only affect your hands, but the whole body. They are however most noticeable in the hands. Low Sugar. Low blood sugar can cause tremors and this can occur if you haven't eaten in a long time and particularly if you haven't eaten carbs. Likewise your blood sugar can fall rapidly in the face of a traumatic event or injury if it causes you to go into shock.