COVID-19(7) Prevalence(6) Saudi Arabia(6) patients(5) severity(5) 95% CI(5) Patient(5) hepatitis B(5) cirrhosis(4) manifestation(3) Comorbidities(3) multiorgan failure(3) lower mortality(3) Mortality(3) abdominal pain(3) reported(3) COVID-19 infection(3) PCR test(3) retrospective(3) higher risk(3) lung infiltration(3) Cytokine storm syndrome(3) lung field(3) Novel coronavirus(3) GI symptom(3) Manifestations(3) acute respiratory distress(3) Middle East(3) syndrome(3) vomiting(3)