Yes patient serum or plazma blood is beneficial for treatment the patient with Covid19 and save them from die but with conditions as the patient should recovery after 14 days from his hill, and same blood group
Plasma from a cured patient from COVID 19 --> Transfusion to COVID 19 infected patients.
The steps are followed to proceed for adaptations:
To check antibody titer including serotype in recipient serum --> Sensitivity and susceptibility of plasma concentrations --> Types of hypersensitivity of recipient considering his age, blood group, and secondary multiple diseases.
Mechanisms: CoV2 virus in lungs --> Pulmonary circulate is occurred (Primary viremia) --> General circulate (Secondary viremia) --> Viruses meet up with donor antibodies. --> Plasma concentration increases --> Decreased concentration of viremia --> Patient gets cured gradually.