|Test Requested||Influenza A removal|
|Sample Description||Air Sniper Pro air cleaners|
|Number of Samples||3|
|Date of Receipt||18 August 2016|
|Report Date||25 October 2016|
Influenza virus infection is one of the most common and highly contagious infectious diseases and can occur in people of any age. Influenza A viruses are transmitted through direct contact, indirect contact, large respiratory droplets and aerosols (droplets nuclei).
Influenza viruses belong to the Orthomyxoviridae family and are divided into types A, B and C. Influenza types A and B are responsible for epidemics of respiratory illness that are often associated with increased rates of hospitalization and death. During the 20th century, the only influenza A subtypes that circulated extensively in humans were (H1N1) Spanish Flu; (H1N2); (H2N2) Asian Flu; and (H3N2) Hong Kong Flu. A new strain of influenza A, H1N1 emerged in 2009 called ‘Swine Flu’ as it originated in swine and spread to humans. More recently in 2013, a new strain of Avian Influenza A, H7N9 has infected people in China and is believed to be from exposure to infected poultry.
All known subtypes of influenza type A viruses have been isolated from birds and can affect a range of mammalian species. As with humans, the number of influenza A subtypes that have been isolated from other mammalian species is limited. Influenza type B viruses almost exclusively infect humans.
In this study influenza type A virus was used for the testing.
The concentration of Influenza A (Inf A) collected by the SKC BioSamplers was determined by ELISA (enzyme-linked immunosorbent assay).
ELISA samples were analysed according to the manufacturer’s specifications and samples were read at 450 nm on a BioTek EL 800 Plate Reader. The concentration of Inf A in each sample was quantified as ng per m3 of sampled air.
Virus reduction percentage was calculated according to the formula below:
1) United States Environmental Protection Agency. EPA-454/B-13-001. Technical Assistance Document for the reporting of Daily Air Quality – The Air Quality Index (AQI). 2013.
2) World Health Organization. WHO Indoor Air Quality Guidelines: Formaldehyde, Chapter 5.8. WHO Regional Office for Europe, Copenhagen, Denmark. 2001