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However, in dusty environments or homes with pets, the filters may need to be replaced sooner, and the impactors may need to be cleaned more often

While the use of complex organotypic airway epithelium tissue cultures grown at the airliquid interface is a step in the right direction, they are not representative of the alveoli and more generally lack the immune cells, fibroblasts and endothelial cells present in the lung

The introduction of vaping, though controversial when its young people doing it, is understood to have helped accelerate the fall in smoking, as per the drug policy charity Transform

The secret lies in our patented 4-stage technology , which combines two crucial components in one filter: high-purity activated carbon and absorbent fiber-based caps