The recombination happened long ago and has nothing to do with the disease. Market workers that handle animals (like masked palm civets) infected with SARS CoV have antibodies to the virus, but don't have SARS.
SARS emerged about a year ago, but the emergence was unrelated to the recombination, which happened thousands or millions of years ago.
If the disease doesn't have a reservoir it can live on in, it may be possible to wipe it out.