Table 1 Epstein-Barr virus serologies during the course of illness
| Â | Diagnosis of HLH | At completion of therapy |
|---|---|---|
EBV nuclear antigen | Positive | Negative |
EBV viral capsid antigen immunoglobulin G | Positive | Negative |
EBV viral capsid antigen immunoglobulin M | Positive | Negative |