I gave you quite a variety actually.....anyway.. Even intact condoms have naturally occurring defects (tiny holes penetrating the entire thickness) measuring five to 50 microns in diameter -- 50 to 500 times the size of the HIV virus, writes C. Michael Roland, head of the Polymer Properties Section at the Naval Research laboratory in Washington, D.C. and editor of Rubber Chemistry and Technology, in a published letter to the Washington Times. [In other words, just as rubber tires, over time, lose air, condoms (manufactured of the same product, rubber) also are porous.]LJS9502_basic
\ You gave me a few sites with questionable, outdated, or downright wrong statistics which I provided evidence against since we begin this little converstaion. And regarding that. 2. This is correct :""The rubber comprising latex condom has intrinsic voids about 5 microns in size." The HIV virus is 0.1 micron. Roland, Rubber World. June 1993. Roland and Sobieski, Rubber Chemistry and Technology. Vol. 62, 1989."However, I posted a source earlier that says that condoms reduce HIV transmission by 80%. 80%. That a significant number considering that condoms does indeed contain microns that HIV could potnetially get through.
me
But we are not done yet.
Thestraightdope.com
"I'll say. Your clip is a 1992 letter to the editor from Mike Roland (The guy who wrote what you just posted), editor ofRubber Chemistry and Technology, a publication of the American Chemical Society. Roland argued that "the rubber comprising latex condoms has intrinsic voids [pores] about 5 microns (0.00002 inches) in size. Since this is roughly 10 times smaller than sperm, the latter are effectively blocked.... Contrarily, the AIDS virus is only 0.1 micron (4 millionths of an inch) in size. Since this is a factor of 50 smaller than the voids inherent in rubber, the virus can readily pass through."
This sounds scary, but there are a couple problems with it. First, Roland bases his statement about a 5 micron latex pore size on a study of rubber gloves, not condoms. The U.S. Public Health Service says that condoms are manufactured to higher standards than gloves. Condoms are dipped in the latex twice, gloves only once. If just 4 out of 1,000 condoms fail the leak test, the whole batch is rejected; the standard for gloves is 40 out of 1,000. A study of latex condoms by the National Institutes of Health using an electron microscope found no holes at a magnification of 2000.
The second problem with Roland's letter is that it suggests, at least to the casual reader, that condoms offer no protection at all against HIV. That's not so. Roland himself estimates that condoms reduce HIV transmission risk by a factor of three. He cites a 1993 analysis by S. C. Weller suggesting that condoms are 69 percent effective in preventing HIV transmission.
The government's counterargument to this is that Weller did not distinguish between consistent and inconsistent users of condoms. Government spokesmen cite two European studies of "serodiscordant" heterosexual couples--that is, one partner had HIV, the other didn't. One study found that among couples using condoms consistently, there were zero cases of HIV transmission between the partners. Inconsistent users had a 10 percent infection rate. The other study found an infection rate of 1.1 percent between consistent users, 5.7 percent between nonusers. In other words, conservatively speaking, condoms reduced HIV transmission risk by a factor of 5.
We could argue about these numbers, but let's put this in perspective. Roland thinks condoms reduce AIDS risk by a factor of 3. A study cited by the government says they reduce it by a factor of 5. Avoiding high-risk sex partners, it's believed, reduces it by a factor of 5,000."
You can also read this:
The CDC's opinion (summary)
LEAKING THROUGH LATEX CONDOMS These are answers from the Centers for Disease Control and Prevention (CDC) to questions concerning the possibility of HIV"leaking" through latex condoms.
1. Can HIV leak through microscopic holes in latex condoms?
The Food and Drug Administration (FDA) published a study in
the July-August 1992 issue of "STD" which examined whether
HIV-sized glass beads could be forced through latex condoms
under stressful laboratory conditions. These conditions
included higher concentrations of the "virus" (glass beads)
than in semen, a fluid that doesn't stick together as much as
semen, and forces that simulated 10 minutes of thrusting AFTER
ejaculation. Most latex condoms leaked absolutely nothing.
The worst condom found would still reduce exposure risk by
10,000-fold, i.e., only 1 HIV virus might "leak" through only
1 of every 90 condoms. Other tests have shown that under
"normal" conditions, HIV does not pass through a latex condom
that is not torn or broken.
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