They're also very common. About fifteen percent of Americans have allergic reactions to cats or dogs. They start sneezing, get a runny nose, and itchy eyes. Those are really quick to happen, usually within a few minutes of contacting the animal.
Experts say cats usually produce more severe allergic reactions than dogs.
Bathing your animal frequently might help. Grooming and keeping it outdoors is also good advice. Have hardwood floors instead of carpeting, and keep your animal out of the bedrooms, especially if you have young children. But the best way to avoid allergies to animals, is to avoid the animals.