Periodic health examinations are important for providing preventive services like screening, counseling, and immunizations. The document outlines recommendations for screening various health measures at different life stages from birth through adulthood. Screenings include developmental screening in young children, vision and hearing tests throughout childhood, lead screening at ages 1-2, and cancer screening, diabetes screening, and hypertension screening in adults. Counseling on topics like injury prevention, nutrition, dental health, and risky behaviors are also recommended parts of periodic health examinations across the lifespan.