Whether children need nucleic acid testing when they go to the hospital with fever mainly depends on the local epidemic prevention and control situation, parents need to cooperate with the local doctors, combined with the local epidemic situation to determine whether they need to do nucleic acid testing, which is generally seen in the following two situations: 1, no nucleic acid testing: there is no local patients with novel coronavirus infections, the children themselves do not have contact with the history of contact with patients with novel coronavirus infections in the epidemiological situation and the fever can be found a clear cause, such as caused by skin infections. Nucleic acid test is not necessary: 1) No local patients with novel coronavirus infection, no history of contact with the child, no epidemiological contact with patients with novel coronavirus infection, and the fever can be found for a clear cause, such as caused by skin infection, inflammation, then nucleic acid test is not necessary; 2) Nucleic acid test is needed: the local outbreak of the situation is more serious, or the local belongs to the medium-high-risk area, the child needs to be tested for nucleic acid in the hospital, which will help to clarify the diagnosis, to protect the child, the family, and even the whole society, and to achieve early detection of the disease, early treatment and to avoid the risk of spreading. Risks. When a child has a fever, parents should take the child to the doctor in time, and actively cooperate with the doctor to carry out epidemiological investigations, and pay attention to the norms of wearing a mask when waiting in line during the nucleic acid test, do not pile up, do not talk to each other, and maintain a one-meter line distance. During the collection of oropharyngeal swabs, the test subjects should tilt their heads back, try to relax, take a deep breath, and open their mouths to make the “ah” sound, which will help to expose the throat, and after the collection, parents should take their children away from the collection site immediately, and avoid spitting and vomiting around the collection site.