Can any Medical types give an answer to the question of this virus reoccuring in an individual who has recoverd from SARS? Also, can these masks really stop a virus? Bacteria and dust particles are much bigger.
Similar coronaviruses, including that for the common cold in humans, can recur in individuals. As for masks, they can certainly stop sputum and droplets of saliva. Those may be the only ways the disease can be communicated through the air -- there is no evidence yet that the virus itself is truly airborne.
I'm not a medical person, so don't count on what I say being necessarily right.