Should I continue taking ARV when my undetectable viral load

 
Your viral load is undetectable because the ARV that you are taking is actively suppressing the virus. Once you stop taking your medication, HIV will start to multiply again. Over time your viral load will increase and CD4 count will decrease. Not only that, the virus in your body may also become resistant to the drugs that you are taking, making it more difficult to control. An undetectable viral load _does not_ mean that the virus is removed form your body. It only means that multiplication of the virus is suppressed and it cannot infect new cells in your body. Treatment for HIV is life long. You should not stop it.