In case one the visit by a child with an upper respiratory infection five days before the onset of illness in the patient represents also a plausible exposure to the 2009 H1N1 virus; in case two the lack of positive anamnesis for other suspicions together with the finding of positive specimens for H1N1 influenza A infection could have caused us arrive at a fashionable diagnosis and stopped us from further investigations. We do think that the immediate suspicion of Legionella infection based on clinical history, X-ray abnormalities and Winthrop University Hospital Infectious Disease Division's diagnostic weighted point system scale (Table 1) were fundamental for a successful resolution [6, 7] .