Medical resources are currently adequate for every SARS patient in the US - the problem arises when the hospitals fill up.
Simply not true in the US or anywhere. Some patients get well, others don't.
It is a mystery why the US has not had any deaths or virulent cases, but it is not due to better/different treatment.
Situation in the US may change at any time due to introduction of a more virulent strain.
No one virus family has been found to occur so far in all patients and this makes development of a specific immunization impossible. General immune-boosting and anti-viral treatments have not been consistently successful.
As I said, some patients get well, others don't.