COVID-19(21) SARS-CoV-2(19) coronavirus(10) Hepatitis B virus(10) acute respiratory syndrome(7) Infection(7) HIV(7) HBV(7) Chronic Hepatitis B(6) Varicella-zoster virus.(6) IgG(6) IgM(6) vaccination.(6) herpes zoster(6) clinical characteristic(5) therapeutic approaches(5) outcome(5) SARS-CoV-2 nucleic acid(5) China(5) conducted(5) SARS-CoV-2 antibody(5) temperature(5) SARS-CoV-2 IgG(5) Coronavirus disease 2019(5) Vaccination Status(5) acute respiratory syndrome coronavirus(5) IgG levels(5) Laboratory(5) analyzed(5) IgG antibody(5)