RISUG is indeed a great contraceptive, but when talking about its benefits for HIV we should be incredibly careful.
RISUG isn't a cure-all. Transmission is still possible through microtears and directly through the skin of the glans penis and the meatus. And RISUG does nothing to prevent female->male transmission.
It's far too easy for "RISUG inactivates HIV in some components of semen" to transmute into "It's ok baby, I got a shot that protects me from HIV!"
Agreed, but spread knowledge of this in Africa where HIV is a big problem, and isn't well understood or cared about (to western standards) and not only could it be a cheap and affordable birth control, but if it reduces the risk in transmission of HIV then its still coming up double.
That policy is a bit risky. That might diminish the use of other things that reduce significantly the spread of HIV, like condoms. It's still unknown how effective the gel is: maybe 90%, maybe 5%, condoms are 90% effective AFAIK[1].
Also, contraceptive success is usually annualized, like with correct condom use, pregnancy happens less than 3 percent per year. I assume there is a standardized level of sexual activity for that, too.
Assuming 1% of partners have AIDS and someone had 10 partners and 35 events per partner.
.01 * (1 - .98)^ 35 = 0.5% per partner. And 1- (1 - .005) ^ 10 = ~5% chance of an infection in a lifetime.
Or working the other way if the average person with aids has 35 'events' per partner and 2.1 partners after infection the infection rate will increase.
PS: Real models include differing M/F infection rates, stratification by age and other vectors like transfusions and IV drug use.
Unsafe injection is the most efficient way to transmit the virus. It's scary that so many injections in the developing world are unsafe. (UNICEF say "16 billion injections are administered each year, of which 90 percent are for curative purposes; 50 percent of the total number of injections are unsafe.")
The contamination of heterosexuals man is hard. It happens, but is very hard. This information is not well spread because it can stimulate men to stop using condoms and increase the risk for women.
RISUG isn't a cure-all. Transmission is still possible through microtears and directly through the skin of the glans penis and the meatus. And RISUG does nothing to prevent female->male transmission.
It's far too easy for "RISUG inactivates HIV in some components of semen" to transmute into "It's ok baby, I got a shot that protects me from HIV!"