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Staying in the same house with a dog increases the immunity of children of any age, including infants. According to research, children who are in the company of a dog are much less likely to suffer from respiratory and other infectious diseases. Many try from childhood to protect children from excess microbes, isolating them from the outside world and placing them in sterile conditions. This harms the immune system, weakens it, while the microbes living on the dog work a miracle - they stimulate the defenses of the child's body.