Definition: A pathogen is a biological agent – such as a bacterium, virus, fungus, parasite or prion – that can cause disease in a host organism. In simple terms: a pathogen is an infectious microbe ...

The World Health Organization is opening up the definition of airborne pathogens – such as Covid-19, influenza and measles – to include when respiratory droplets spread through the air and when they ...

Please provide your email address to receive an email when new articles are posted on . WHO updated its definition of what constitutes an airborne pathogen. Under the new definition, pathogens ...