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Is condom 100% safe for HIV?

http://www.cdc.gov/condomeffectiveness/latex.htm

Laboratory studies have demonstrated that latex condoms provide an essentially impermeable barrier to particles the size of HIV.

Here "essentially" but not "completely" used , I want to know why? Can hiv pass through latex condom? Thank you!!!

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Avatar universal
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Avatar universal
Who can help me to ask cdc about this problem? Why they use"essentially", not "completely"? I am afraid a little virus may go through the condom.

I am not in America, and my spoken English is poor. Thank you sincerely.
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Avatar universal
No it doesn't mean that at all. Good god. Move on.
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Avatar universal
In the following URL,
http://www.cdc.gov/condomeffectiveness/latex.htm
to all diseases, cdc uses "essentially".
Maybe cdc mean some hiv particles may go through the condom, so they use "essentially" . But the amount of hiv virus is not enough to cause hiv infection. So the effect is not 100% in theory, but it is 100% in practical.
But I heared that if someone is infected with a little virus, the window peoriod may be longer than 3 months or even antibody does not appear.
Am I right.
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Avatar universal
Here is what it actually says, "Laboratory studies have demonstrated that latex condoms provide an essentially impermeable barrier to particles the size of STD pathogens."

Don't read into it more that what it says.
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Avatar universal
Here is the laboratory studies, which mean theoretical.
In China, there is a statement that, diameter of water molecule is 0.4nm, diameter of hiv is 120nm. Hiv stays in vaginal fluid or semen. We know that water can not pass through the condom, so hiv can not pass through condom too.  
Whether is it right? Why US CDC did not adopt this statement, and still says"Laboratory studies have demonstrated that latex condoms provide an essentially impermeable barrier to particles the size of HIV". "essentially" but not "completely".
Thank you!!!
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Avatar universal
The don't put the 100% claim, because there are people that they can't assume can use a condom correctly and consistently.

Latex condoms, when used consistently and correctly, are highly effective in preventing the sexual transmission of HIV, the virus that causes AIDS. In addition, consistent and correct use of latex condoms reduces the risk of other sexually transmitted diseases (STDs), including diseases transmitted by genital secretions, and to a lesser degree, genital ulcer diseases. Condom use may reduce the risk for genital human papillomavirus (HPV) infection and HPV-associated diseases, e.g., genital warts and cervical cancer.
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