Blood tests for COVID-19 include antibody tests and PCR tests. PCR tests detect active infections by identifying viral RNA, while antibody tests identify past infections and measure immune response.

Blood tests play a crucial role in managing high blood pressure by helping to identify underlying causes, assess organ function, and monitor treatment effectiveness. Key markers include electrolytes, kidney function, and lipid profiles.

Regular blood tests are essential for fitness enthusiasts as they provide critical insights into nutritional deficiencies, hormone levels, and overall health, allowing for optimized performance and recovery.

Stress can significantly affect blood test results by altering hormone levels, blood pressure, and glucose, potentially leading to misleading assessments. Managing stress before blood tests is crucial for accurate results.