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By Mayo Clinic staffPet allergies are common. However, you're more likely to develop sensitivity to pet allergens if allergies or asthma runs in your family.
Research about the effect of early exposure to pets and the risk of allergy and asthma is inconsistent. However, a number of studies suggest that exposure to cats in early childhood may slightly decrease the risk of cat allergy. Other studies suggest that early exposure to dogs has no effect on risk or only slightly increases the risk.
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