Allerca has bred hypoallergenic cats. By changing one of the proteins produced by cats, the company was able to breed kitties that look normal but don't cause sneezes -- at a cost of $3950.
To justify this expense, the press release mentions the health benefits of pets:
"Some of the well documented scientifically demonstrated benefits of pet ownership* include: increased sense of well being, reduced anxiety and stress, decreased feelings of loneliness and isolation. Pets lower blood pressure, while increasing oxytocin (happiness hormone), increasing phenyl ethylamine (attention hormone), and increasing endorphin (warm feeling hormone). Pets also increase levels of serotonin, a natural anti-depression chemical."
(This outstanding photo does not show the Allerca cats, but rather some seen on Mauritius. Thanks, Mira!)