1. Disease Detection: Blood tests can identify the presence of infectious agents such as viruses and bacteria. For example, blood samples were critical in identifying and tracking the spread of the COVID-19 virus during the pandemic. 2. Biomarker Analysis: Biomarkers in blood can give insights into physiological and pathological processes. For instance, levels of cholesterol or glucose can indicate the risk of cardiovascular diseases or diabetes. 3. Genetic Studies: Blood samples can be used for genetic testing to identify genetic predispositions to certain diseases, allowing for targeted public health interventions. 4. Exposure Assessment: Blood can be analyzed for exposure to environmental toxins or pollutants, helping epidemiologists understand correlations between environmental factors and health outcomes.
