I'm not going to do the academic legwork for others as you can do it yourself, but to clear up some of the common misunderstandings, and to state the obvious for people who need it, the following statements are all supported by the current research:

1. Condoms are very effective at reducing risk of infection for many STIs when used correctly.
2. People who have multiple sexual partners are at higher risk of STI infection.
3. Sex workers in Australia have comparable rates of incidence of STI infection to those who are not sex workers.
4. Condom use in Australia (particularly for people under 30) is decreasing and rates of gonorrhea, chlamydia and syphilis are increasing.