Treasure Island, by Robert Louis Stevenson
Answer:
Wash your hands well. ...
Cover a cough. ...
Wash and bandage all cuts. ...
Do not pick at healing wounds or blemishes, or squeeze pimples.
Don't share dishes, glasses, or eating utensils.
Avoid direct contact with napkins, tissues, handkerchiefs, or similar items used by others
I guess you could say its also like parental genetics except we have our own genes the way you move your hand is different then other peoples hand movement