Public health laboratories are specialized facilities that play a crucial role in monitoring and improving community health. They conduct tests on samples from humans, animals, and the environment to detect diseases, pathogens, and other health threats. These laboratories help in disease surveillance, outbreak response, and ensuring the safety of food and water. In addition to testing, public health laboratories provide essential support for research and development of new diagnostic methods and treatments. They collaborate with organizations like the Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO) to share data and improve public health strategies globally.