Health surveys are research tools used to assess the health status of individuals or populations. These surveys often collect information about an individual's health behaviors, medical history, and access to healthcare services. Health surveys can be conducted in-person, over the phone, online, or through mailed questionnaires. The data collected from these surveys can be used to identify trends in health outcomes, measure the prevalence of certain health conditions, and inform public health policies and programs. Some common types of health surveys include the National Health Interview Survey (NHIS) and the Behavioral Risk Factor Surveillance System (BRFSS).