I'd say either meth or heroin
Impetigo causes weeping sores, its the 'weeping' that is contagious. Be it via skin to skin contact, a towel or virtually anything. When the sores are fully scabbed they are not contagious, its only the liquid inside the sores that is contagious.
Chickenpox is contagious until the chickenpox blisters and sores are scabbed.
If you have the chickenpox, you should stay home until you are no longer contagious; that is, until all blisters and sores have scabbed.
An elbow that is infected with staph infection will be red and it may have sores on it. In worst cases, the sores are open and oozing.
Cold sores can be secondarily infected with bacteria, resulting in impetigo.
bisters
Aluminium cans can give you cold sores only if you immediately drink from an infected persons can.
Cold sores are common; 80% of us are infected with the virus.
If you are infected with the herpes virus, then yes you can.
You will get black sores and they will pop and you would eventually die.
It can also be spread to other people if they touch the infected sores or if they have contact with the soiled clothing, diapers, bed sheets, or toys of an infected person.
according to kidshealth.org, genital herpes can be spread via sores. but can be spread via blood if sores are not present. so the answer is sores!