GPT and hepatitis A virus infection: Ab: antibody; Ag: antigen; ALT: alanine transaminase; AST: aspartate transaminase; BUN: blood urea nitrogen; Hep: hepatitis; IgG: immunoglobulin G; IgM: immunoglobulin M; pCO2: partial pressure of carbon dioxide; PCR: polymerase chain reaction; pH: potential hydrogen; pO2: partial pressure of oxygen; RSV: respiratory syncytial virus; SARS-COV-2: severe acute respiratory syndrome coronavirus 2; WBC: white blood cell.