What are the chances of contracting hiv or hepatitis if you prick your finger with a needle used by a sick person?

Answer from: Anna M.:
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Hepatitis infection is usually talked about - "on a needle". It means that the smallest concentration of the virus will infect you. HIV is better in this regard - you need a much higher concentration of the virus. Hepatitis B is very resistant in the environment, unlike HIV - outside the body it lives a few minutes. When talking specifically about HIV and needles, a number of factors are important here - the titer of the virus itself, the amount of blood in the needle, and the temperature of the environment. If the OS temperature is low - the life time of the virus increases, if other favorable factors are added, the life time of the virus in the needle can be as much as 10 days.

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