Most people say that sharing drinks and stuff is bad but what are the extreme cases...?

and what other disease are contractable from sharing drinks, utensils, food, not washing hands all these things that people dont think about but are very seriousMost people say that sharing drinks and stuff is bad but what are the extreme cases...?
i heard of a guy who shared a drink with another guy and he got meningacocal (i know i spelt it wrong) from it and lost half his nose and his face in general was just all scarred and disfigured, and he was only a teenager.Most people say that sharing drinks and stuff is bad but what are the extreme cases...?
Aids, sharing tooth brushes can leed to this, never use someone elses brush.
MONO - it's not worth it! don't share
Hepatitis A, which can be fatal in adults.
in teenagers, when you are close, and share drinks, or you kiss, you can contract meningitis, which is a brain infection, not a good thing. You can get hepatitis. You can get a virus. You can get many conditions through the transport of germs... Tuberculosis... Ecoli poisoning... food poisoning
Meningitis can be passed by sharing drink bottles, even water. the symptoms are headache, flu-like aches and pains and sensitivity to light. It can be FATAL. Teenagers die from this every year.