There is no age limit for nucleic acid testing; it is required if indicated and socially required. Nucleic acid testing is a screening and diagnostic test for novel coronaviruses by collecting a sample through a throat swab or nasal swab. For places where it is safe to live, children under the age of three can be tested voluntarily depending on the circumstances; if in a high-risk area, surrounded by patients with novel coronavirus pneumonia, close contacts, etc., even small infants of a few months old or even newborns need to undergo nucleic acid testing. Many pediatric patients are not cooperative when undergoing nucleic acid testing, so parents need to reassure their babies more before the nucleic acid test, and at the same time pay attention to avoiding satiety before the test so as not to cause vomiting that could lead to aspiration and other situations. [Tip] This article refers to the “new coronary pneumonia, new coronary virus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to the “new coronary virus infection”.