The main route of transmission of pneumonia from novel coronavirus infections is through respiratory droplets, but also through contact, so wearing a mask is a very effective protective measure. When buying a mask for your child, you should be careful to buy a child-friendly mask for children, and never use an adult mask instead, as this will not achieve the preventive and control effect. In addition, children under the age of 1 are not very suitable for wearing masks, at this time parents should pay attention to do a good job of protection, indirect protection of children. When wearing a mask, the mask should be close to the face, and must be replaced immediately if it becomes wet and dirty due to secretions. After removing and discarding the mask, hands should be washed.