U=U stands for Undetectable=Untransmittable. It means that people living with HIV who take their medication daily as prescribed and have an undetectable viral load (<200 copies/mL) cannot pass HIV to their sexual partners with or without condoms and PrEP.
Having a viral load less than 200 copies for 6 months means someone living with HIV is undetectable and cannot sexually transmit the virus.
People living with HIV who take medications daily as prescribed can achieve a suppressed viral load within 2-3 months.
Condoms are still important to prevent against other sexually transmitted infections.
Having a suppressed viral load is an essential part of staying healthy and preventing sexual transmission of HIV.