<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).
Patients with essential tremor shake when they move their hand, while Parkinsonâs sufferers shake when they stay still. Parkinsonâs disease is a disorder of the nervous system characterized by tremor and shaking, weakness and facial paralysis. It occurs when the nerve cells in the brain that make dopamine are destroyed.