They found that 55.2% of hospitalized COVID-19 patients between 9 January 2020 and 29 February 2020 with serological confirmation of past EBV infection also tested positive for EBV VCA IgM, indicating EBV reactivation within two weeks of testing positive for SARS-CoV-2 [19]. The gene discussed is CD40LG; the disease is COVID-19.