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hiv transmission questions

hello everyone.
I am come from china,I have some questions,and that confused me.
in this,I learned hiv can not live outside the host,so tattoo ,tooth extraction,share shave  knife can not transmit hiv,but in my country,many doctors says that have  risk.yet french kiss has risk too.
in medhelp :
hiv is transmitted through...
unprotected vaginal/anal intercourse
sharing iv drug works
mother to child .
why have so many differences?
thanks a lot .sorry my english is poor.
Best Answer
1563685 tn?1310402354
Oral activities including sex pose no HIV risk because the saliva contains numerous enzymes that block HIV transmission.

Tatoo doesn't pose HIV risk because HIV virus becomes inactive/uninfectious immediately when it's exposed to the air.
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Avatar universal
thank you
Helpful - 0
Avatar universal
no ,they are work in cdc,and yphilology,in our country ,there are over 3000 cdc。
Helpful - 0
1563685 tn?1310402354
The doctors that say so may not specialise in HIV.
Helpful - 0
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