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The influenza A/H1N1 pandemic in 2009 taught us that the monitoring of vaccine benefits and risks in Europe had potential for improvement if different public and private stakeholders would collaborate better (public health institutes (PHIs), regulatory authorities, research institutes, vaccine manufacturers). The Innovative Medicines Initiative (IMI) subsequently issued a competitive call to establish a public-private partnership to build and test a novel system for monitoring vaccine benefits and risks in Europe. The ADVANCE project (Accelerated Development of Vaccine benefit-risk Collaboration in Europe) was created as a result. The objective of this paper is to describe the perspectives of key stakeholder groups of the ADVANCE consortium for vaccine benefit-risk monitoring and their views on how to build a European system addressing the needs and challenges of such monitoring. These perspectives and needs were assessed at the start of the ADVANCE project by the European Medicines Agency together with representatives of the main stakeholders in the field of vaccines within and outside the ADVANCE consortium (i.e. research institutes, public health institutes, medicines regulatory authorities, vaccine manufacturers, patient associations). Although all stakeholder representatives stated they conduct vaccine benefit-risk monitoring according to their own remit, needs and obligations, they are faced with similar challenges and needs for improved collaboration. A robust, rapid system yielding high-quality information on the benefits and risks of vaccines would therefore support their decision making. ADVANCE has developed such a system and has tested its performance in a series of proof of concept (POC) studies. The system, how it was used and the results from the POC studies are described in the papers in this supplementary issue.

Nosocomially acquired aspergillosis typically occurs in the setting of treatment for leukaemia or other haematological malignancy. As Aspergillus species can be readily found in the environment, it has been widely believed that aspergillosis occurs as a consequence of exogenous acquisition of the fungus. Stringent environmental controls in transplant units have included high-efficiency air filtration, positive-pressure ventilation and frequent room air changes. Although there have been several well-documented examples of aspergillosis outbreaks as a result of hospital demolition and reconstruction, it has not always been possible to demonstrate elevated spore counts in clinical areas during building work. The sampling of air for Aspergillus is very problematic. Careful attention must be given to the design of air sampler, sampling protocols and an understanding of air sampling data. This review outlines many of the physical and environmental parameters that influence meaningful air sampling and recommends a simple procedure that has been tried and tested in many aspergillosis outbreaks.