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Vaccination coverage of Greek paediatric healthcare workers against seasonal and A/H1N1 influenza

Sir, The recent work by Shultz et al. about the reliability of classifying preschool wheeze into episodic viral or multiple trigger contributes greatly to clear up the usefulness of such classification proposed by an ERS Task Force (1). The guidelines produced by that group avoided the use of the term asthma for preschool wheezers and defined the aforementioned temporal patterns of wheeze to decide the suitable treatment (2). The observation that half of the children could evolve from one to other pattern in just 1 year discloses its inconsistence and answers the questions raised about the dangers of creating a flawed classification (3). We bring some other arguments against that classification: