Level 1: Why do babies have poor immunity? 1. Imperfect immunity: The baby\’s immunity is not fully developed and cannot effectively resist the invasion of various viruses and bacteria. 2. Influence of the external environment: The baby\’s body has weak adaptability to the external environment and is easily affected by factors such as temperature, humidity, and air quality, which can lead to physical discomfort. 3. Insufficient nutrition If the baby does not consume enough nutrients, it will lead to a decrease in body resistance. Level 2: How to enhance baby’s resistance? 1. Breastfeeding Breast milk is rich in nutrients and antibodies, which can help babies build their own