A school nurse receives a telephone call from a parent who suspects their school-age child may have coronavirus-2 (SARS-C0V-2). Which of the following instructions should the nurse give as secondary prevention?

Secondary prevention focuses on early detection and prompt treatment of disease in order to limit its progression and reduce complications. Testing a child who is symptomatic or suspected of having SARS-CoV-2 is the classic example of secondary prevention because it identifies the illness at an early stage, allowing for timely isolation and management. This aligns with the screening and early detection activities that characterize secondary prevention. Taking the child to the hospital if they develop difficulty breathing represents tertiary prevention, which addresses managing complications and preventing further deterioration in someone already known to be ill. Wearing a mask to school is a primary prevention measure aimed at reducing the risk of exposure before illness occurs. Immunization before coming to school is also primary prevention because it protects against infection before any exposure or illness takes place. The key distinction among the three prevention levels is timing: primary prevention occurs before illness, secondary prevention detects and addresses illness early, and tertiary prevention manages established disease to prevent worsening. Because testing confirms the diagnosis at an early stage and enables prompt, appropriate action, it correctly represents secondary prevention in this scenario.