Two points, the most effective treatments we have for deadly diseases are vaccines which are effective precisely because they rely on our naturally evolved defe

Two points, the most effective treatments we have for deadly diseases are vaccines which are effective precisely because they rely on our naturally evolved defences. Antibiotics are a runner up but are eventually rendered ineffective by evolution of bacteria they target. Second, Covid-19 is only new to humans, given time it will adapt to us and will likely attenuate.