Fever and dyspnoea in a young man with a rash

Principle causes of diffuse nodular shadowing metastatic carcinoma to lungs lymphoma alveolar cell carcinoma sarcoidosis tuberculosis fungal diseases (histoplasmosis; cryptococcosis; coccidioidomycosis; blastomycosis) pneumoconiosis varicella pneumonia systemic vasculitis (Wegener's granulomatosis and peri-arteritis nodosa) collagen vascular disease (including rheumatoid nodules and systemic lupus erythematosus) septic emboli arteriovenous malformations haemosiderosis (including Goodpastures's disease) amyloidosis cryptogenic organising pneumonia/bronchiolitis obliterans organising pneumonia alveolar proteinosis pneumocystis carinii pneumonitis Kaposi's sarcoma QUESTION 2 Acyclovir is preferred over vidarabine for treatment. [...]it has been reported that conventional 'low-dose' corticosteroid therapy (