In medicine, a screening test is a test that is performed when there are no signs or symptoms of disease. Without symptoms of disease, children generally do not need many laboratory screening tests. Preventive services for children emphasize immunisation and prevention of accidents and injuries as well as counselling on development of healthy eating and exercise habits. In addition to immunisation boosters, vaccination for tuberculosis is offered between the ages of 10 and 14 following patch testing (see the NHS vaccination schedule). Height, weight, blood pressure, and should be monitored during periodic health examinations. Screening to prevent tooth decay is carried out through regular dental checks in schools.
Although health screening laboratory tests are usually not conducted on the whole population of children without symptoms of disease, some screening tests may be recommended based on known risk factors. This is called "Targeted Screening".