Treatment is orthogonal. Vaccines reduce the odds of getting sick in the first place.

Once you're sick, you can consider treatments. A little chicken broth does wonders if you're merely dehydrated from fever, but you may need something more potent. Treatments require their own randomized control trials, some educated guess work pending their results. One those results are in, it's important to drop any obsession with said treatment - because that's where optimism turns into quackery.