ALB and myocarditis: All clinical and laboratory signs typical of FIP improved during antiviral treatment [5]; in most cats, the improvement of other clinical and laboratory parameters (normalization by day 28–42 at the latest), such as the Karnofsky’s score, hematocrit, bilirubin concentration, and albumin concentration, occurred more rapidly than the recovery from FIP-induced myocarditis (Table 1).