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During the 2009 H1N1 influenza pandemic, elderly or obese patients and those with neurological disease had an increased risk for severe H1N1 infection in Austria. Pregnancy was not associated with a higher risk for severe disease in the later phase of the 2009 H1N1 pandemic. Antiviral treatment provided a minimal effect on the symptoms of influenza but reduced the risk of admission to an ICU.

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model with particular emphasis on the incorporation of ladle glaze, which has been identi ed as a potential source A potential source of inclusions in liquid steel is of inclusions of variable, often undesirable, composition. A ladle glaze, the slag/inclusion coating on the description of pilot plant experiments that were carried out refractory lining of the ladle which is always present to determine the eVect of tapping operations on ladle glaze after casting and before reuse of the ladle. The is given, together with some results of the mathematical composition and quantity of this glaze can vary model incorporating ladle glaze. The implications for the considerably, depending on the range of steel production of clean steel are assessed. qualities being made and, in order to model the effect of glaze on inclusion/top slag formation, a combined fluid flow-thermodynamic model has DESCRIPTION OF MODEL been developed. The behaviour of ladle glaze for Details of the model are described elsewhere. 7 The ladle is various different steels has been studied under pilot divided into 400 'cells' in which the concentrations of all the plant conditions and the results incorporated into dissolved species, elements, and oxides, are known, as well the mathematical model. The implications of the as the temperature and pressure. Important assumptions pilot plant and model results are discussed in the regarding the processes now being modelled include: context of the production of clean steel. I&S/15811. The ferroalloy additions are added to the lling ladle in the same sequence and rate as those used during a plant At the time the work was carried out Dr Hassall, Mr Bain, and trial. They occupy de ned positions depending on density, Dr Warman were with Corus Research, Development and Techwith the elements being released into the liquid steel as a