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could something have entered through my scalp?

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Hi there I have really bad dandruff and as a result i constantly itch my head and pick at it to the point that it bleeds sometimes. I remember one day about am hour before my haircut I was scratching my head and little bit of bleeding occured. Later when i went to get hair cut the barber used a sharp comb am i at any risk if the comb had blood on it as i may have caused minor sores by scratching my head could something have entered through my scalp ?

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replied May 19th, 2016
HIV and AIDS Answer A57256
A person who has HIV carries the virus in certain body fluids, including blood, semen, vaginal secretions, and breast milk. The virus can be transmitted only if such HIV-infected fluids enter the bloodstream of another person.

This kind of direct entry can occur
(1) through the linings of the vagina, rectum, mouth, and the opening at the tip of the penis;
(2) through intravenous injection with a syringe; or
(3) through a break in the skin, such as a cut or sore.

But, there is no risk of infection by the history you have mentioned here.

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