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How long does HIV survive outside the body?

How long? few minutes? few seconds? or immediately?  I had read  the answer on the website of CDC is :Scientists and medical authorities agree that HIV does not survive well outside the body, making the possibility of environmental transmission remote. and I also read :there are 8 causes "Human Immunodeficiency Virus Transmission in Household Settings — United States.” BUT I can read some answers of export in medhelp are : the virus dies  when they are outside the body.  I was puzzled, and Which answers are accurate?
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so in saying that, as soon as the blood hits air it dies?
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If there was a gush of blood from the wound and the blood touch someone open wound, is this people infected?
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The person that is infected is the HOST.
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I' m very glad to read your answer and could you please explain what's the "host" mean? Body or body fluid(such as blood)?
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The virus isn't alive, it is either active or inactive. HIV is not transmitted outside it's host.
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