Either by no longer testing for it (which allows one to claim victory), or by modifying the policy, or by modifying what "zero covid" means (hey, if politicians

Either by no longer testing for it (which allows one to claim victory), or by modifying the policy, or by modifying what "zero covid" means (hey, if politicians can redefine pi, why could not they redefine zero). Flippant tone aside, I think those are your only options. My 2c.