Risks

Blood has been used to treat many other conditions. It's usually very safe. The risk of getting COVID-19 from convalescent plasma hasn't been tested yet. But researchers believe that the risk is low because donors have fully recovered from the infection.

Convalescent plasma therapy has some risks, such as:

• Allergic reactions
• Lung damage and difficulty breathing
• Infections such as HIV and hepatitis B and C

The risk of such infections is low. Donated blood must be tested for safety. Some people may have mild complications or none at all. Other people may have severe or life-threatening complications.