- exclusion criteria for donors: presence of pregnancy, recent history of transfusion of blood components, < 18 years. - exclusion criteria for covid-19 infected patients: non serious covid-19 infection, impossibility to sign the informed consent (also through the legal tutor)

- exclusion criteria for donors: presence of pregnancy, recent history of transfusion of blood components, < 18 years. - exclusion criteria for covid-19 infected patients: non serious covid-19 infection, impossibility to sign the informed consent (also through the legal tutor)