One of the ways that disease is spread is when the blood of a diseased person is unknowingly transfused to another person in need of blood. Safe blood is vital to disease control. Learn more about blood and disease worldwide by taking this short quiz.


1. Blood is commonly needed for all the following, except:


2. True or False? The best way to ensure a safe blood supply is to pay blood donors rather than rely on blood donations.


3. True or False? Blood donations are actually far higher in middle and lower-income countries than high-income countries.


4. True or False? By separating blood into its different components – plasma, red cells, platelets and cryoprecipitate – one unit of blood from one person can help more people.


5. According to the American Red Cross, the average adult has about _____ pints of blood in their body. About ____ is given during a donation.