This article suggests that pets are good for you. Apparently owning a pet can reduce the owners chances of developing cancer by nearly a third. Studies carried out at the University of California, San Francisco and Stanford University in California have found that pets can help protect against cancer by boosting the immune system. Previous studies have also found that children that have pets take fewer days off school because they are much more resistant to infections. Based on this I should be very healthy I have lots of cats.