Human samples refer to biological materials collected from individuals for research or medical purposes. These samples can include blood, saliva, urine, tissue, and other bodily fluids. They are essential for studying diseases, understanding human biology, and developing new treatments. Researchers use human samples to conduct various tests and experiments. For example, samples can help identify genetic disorders, evaluate the effectiveness of drugs, or study the spread of infections. Proper collection and handling of these samples are crucial to ensure accurate results and maintain the integrity of the research, adhering to ethical guidelines and regulations.