This medical analysis has several advantages:
 To diagnose:

• An acute infection in addition to PCR testing
  •  A previous infection among patients not benefiting from a PCR test at the time symptoms appeared or where the PCR test result was negative
• To know one's immune status vis-à-vis the virus, especially as asymptomatic infections are frequent.
  •  To characterise the immune response following vaccination

Please note: in the case of an one-off prescription, this test does not allow a person's contagiousness to be assessed (in the absence of a prior infection proved by the PCR test).