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Here's a more detailed explanation:
What is PrEP?
PrEP involves taking antiretroviral drugs to prevent HIV infection in people who are at risk of HIV exposure but are not yet infected.
How effective is it?
When taken as prescribed (daily or on-demand), PrEP significantly reduces the risk of HIV infection, with some studies showing a reduction of up to 99%.
Who can take it?
PrEP is recommended for individuals at risk of HIV infection, including those who are men who have sex with men (MSM), heterosexual men and women, transgender people, and people who inject drugs.
How to access PrEP in Australia:
Any doctor can prescribe PrEP, and it is available through the Australian Healthcare System.
Important Considerations:
PrEP does not protect against other sexually transmitted infections (STIs).
Condoms and regular STI screening are still important for protecting against STIs.
It's crucial to take PrEP consistently as prescribed to ensure its effectiveness.
PrEP is most effective when taken before potential exposure to HIV.
PrEP can be taken daily, on-demand or periodically during periods of increased risk.


Please go and read up. There are plenty of resources available.