They vent at the same point as before, based on breathing. But they were telling people not to come in until they were having difficulty breathing, because they didn't have any early treatment or any space. Having access to remdesivir/steroids would mean people should come in for treatment early, but it only helps if given very early. But if infection numbers were large enough then we probably wouldn't manage to treat everyone early enough, so it would cut the rate of severe cases by an unknown amount.