Introduction Although rhinitis is among the most common diseases worldwide, rhinitis
prevalence in the general adult population is unclear and definitions differ widely. Objective …

There is accumulating evidence to suggest that the environmental microbiome plays a
significant role in asthma development. The very low prevalence of asthma in populations …

There is conflicting evidence on the protective role of breastfeeding in relation to the
development of allergic sensitisation and allergic disease. Studies vary in methodology and …

Background Studies examining associations of early-life cat and dog ownership with
childhood asthma have reported inconsistent results. Several factors could explain these …

Background The prevalence of allergic diseases differs in urban and rural populations.
Objective We sought to assess associations between environmental and dietary factors with …

Background Normal airway microbial communities play a central role in respiratory health
but are poorly characterized. Cigarette smoking is the dominant global environmental …

Background Published data shows different prevalence trends depending on the region of
Europe. Aim The aim of the study was to analyze time trends of the frequency of the …

Background Early-life animal exposure has been associated with both protective and
harmful effects on asthma and allergic disease. We aimed to explore factors that may modify …

The World Asthma Phenotypes (WASP) study started in 2016 and has been conducted in
five centres, in the UK, New Zealand, Brazil, Ecuador and Uganda. The objectives of this …

Atopic dermatitis (AD) is one of the most common inflammatory skin conditions, affecting
15% to 30% of children and 2% to 10% of adults. Population-based studies suggest that …