For the longest time, people believed that owning a cat could make you healthier. First, cats can help lower your blood pressure and stress level (when they’re not actively raising your blood pressure and stress level). Second, cats contain all sorts of dirt and fur that can force a person’s immune system to improve.
Unfortunately, the latest studies suggest that owning a cat won’t make you healthier after all. It seems that people who own cats tend to be healthier than the average person anyway so giving cats the credit seems misplaced. Then again, cats will cheerfully take credit for something they never did, which is why they’re cats.