What is the medical certificate of blood donation?

Blood donation is a quick test now. First, take your blood pressure. You can't donate blood for hypertension or underweight. Then, you can take two tubes of blood and do a quick test in the instrument. It takes about 3-5 minutes to confirm what blood type it is and whether it is suitable for blood donation. If you are qualified, get on the bus and donate blood. I will send you a blood donation card. I will send you a text message within a week, and your blood test result is the final result.