This Glossary is intended to assist readers when referring to technical language used in our materials. The definitions represent the meanings understood and shared by Synairgen and the wider scientific community.



A virus that can cause respiratory disease (e.g. the common cold), conjunctivitis and gastroenteritis

Airways (or bronchial tubes)

The tubes that carry air in and out of the lungs


A substance that may provoke an allergic response in a susceptible person. Common allergens include house dust mite faeces, grass pollen and cat dander


A protein produced by cells of the immune system which specifically recognises a target molecule known as an antigen. A key component of the body's immune defence mechanism to foreign agents


A molecule that is capable of stimulating production of an antibody in the body, usually a foreign and potentially toxic molecule


Any substance that can either destroy viruses or suppress their growth


A laboratory test used to determine parameters such as the strength of a solution, the proportion of a compound in a mixture, the potency of a drug or the purity of a preparation


A disorder in which the airways become episodically narrowed, leading to wheeze, shortness of breath, cough and chest tightness