The present invention provides new compositions and methods for preventing and treating pathogen infection. In particular, the present invention provides compounds having an anchoring domain that anchors the compound to the surface of a target cell, and a therapeutic domain that can act extracellularly to prevent infection of a target cell by a pathogen, such as a virus. The present invention also comprises therapeutic compositions having sialidase activity, including protein-based compounds having sialidase catalytic domains. Compounds of the invention can be used for treating or preventing pathogen infection, and for treating and reducing allergic and inflammatory responses. The invention also provides compositions and methods for enhancing transduction of target cells by recombinant viruses. Such compositions and methods can be used in gene therapy.

A method is provided for characterising and/or prognosing prostate cancer in a subject comprising measuring the level of at least one protein from a panel or at least one peptide thereof in a sample from the subject. The method may be used to determine the grade and stage of the prostate cancer. Also disclosed is a method for selecting a treatment for prostate cancer, together with corresponding methods of treatment. Systems and computing devices for performing the methods are also provided.

The present invention provides a method of fractionating human plasma, in some embodiments, using the Cohn fractionation procedure. The improvement comprises the use of physiologically active reconstituted spray dried human plasma as the starting material for the fractionation procedure.