I’ve never suggested that natural immunity doesn’t wane over time - although it does offer a more broad and durable immunity, meaning if you are exposed to subsequent variants, your immune response has a greater chance at offering protection, and your immune memory can be updated to recognize the contemporary variants in circulation.

Even if your immunity wanes, your lingering immune memory will allow your body to mount a more targeted immune response when compared to a first exposure to a novel virus.

We’re not talking about blocking infection. We’re talking about reducing death and serious illness.

You can attempt to avoid infection, although it’s unrealistic to effectively prevent while living a normal healthy life. Your best bet is to maximize your natural immune health, and focus on protecting the most vulnerable in society.