Health records serve two main functions - primary and secondary. The primary function is to record important clinical information for healthcare professionals involved in a patient's care, such as treatments, allergies, medications, test results, and personal details. The secondary function is to use anonymized record data to improve public health services, track disease spread and risk factors, and conduct clinical research on treatment effectiveness. Records take many forms, both paper and electronic, and include notes from appointments, hospital admission and discharge records, test results, x-rays, and images. Employers and those in control of premises have a legal duty under RIDDOR to record and report work-related injuries, diseases, and incidents.