Becaus I thought that it was originally SIV which is found in monkeys so how come that it was transmitted in humans and became HIV?................Is there any other ways of transmission or odd ways except unprotected anal/vaginal sex, contaminated syringes/needles and mother to child? I can't help but when I think of this disease I think of it too much because of discrimination so I want to clarify how it is actually transmitted.
Originated, and transmitted are two different things.
You don't have an HIV concern with rats, period.
*I mean, risk free of HIV
So am I risk free?............but how come that HIV was originated from chimpanzees? Sorry if I may ask
No...no other animal or insects carry or transmit HIV to humans. It's strictly human to human transmission.
That being said, rats and their waste carry risks of other diseases:
http://www.cdc.gov/rodents/diseases/direct.html
I would strongly recommend doing what you can to reduce or eliminate your health risk. If you cannot eradicate the rats completely (I don't know your living situation), in the very least, you should be diligent about cleaning up any signs (feces, etc) that you see.
Another question, are rats/rodents could carry and transmit HIV to humans?
But would it still be riskless even if I don't clean it with alcohol and just let it dry on the desk and there are household rats on it?
What are the diseases that are carried by household rats?
even if I was doing it before? Normally after I use it I just let it dry in the air, its just happened that it was submerged in floodwater and stored in the stockroom so I cleaned it with alcohol.
No risk you even washed them with alcohol.