Against infection, probably not very much. But your immune system has been primed to handle it so the likelihood that you're going to need a trip to the hospital or die is very, very low absent having a compromised immune system.
One of the reasons the death rate was so high for this thing initially was it was a novel virus. No one had any experience with it and it was causing all kinds of chaos to people's immune systems. Now, most people have either had some version of the virus or have been vaccinated, so your T cells are ready to fight it even if it's a variant that escapes your initial immune responses like antibodies. That's why you'll still get sick, but are significantly less likely to die or need hospitalization now versus 2020/2021.