4C Mortality Score — COVID-19 (ISARIC) is a prognosis tool commonly applied in Infectious Disease. Hospital presentation mortality stratification (0–21) from age, sex, comorbidities, respiratory rate, SpO₂, GCS, urea, and CRP. Use the interactive calculator for inputs, limitations, and primary references.

Not a substitute for clinical judgment. Verify critical values with primary literature, local protocols, and specialist input when appropriate.