28 • Avoid harmful chemicals – Less exposure to pollution, dust, and pesticides keeps kids safe. • Enough sleep – 9–12 hours of sleep helps the body heal and stay strong. • Physical act ivi ty – Running, playing, and outdoor time activate the immune system. • Sunlight for Vitamin D – Helps build strong bones and immunity. CHAPTER 4 Immunity – Nature vs. Nurture • Less stress, more love – A happy and relaxed child gets sick less often. How Does Early Life Shape Immunity? A baby’s immune system learns from surrounding exposure to mild infections, helping his/her body remember and fight germs better in the future. A child’s diet, sleep, and hygiene habits shape how strong the immune system becomes over time. By focusing on healthy habits, parents can help their children build a strong immune system, irrespective of their genetic makeup!
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