Editing Pathogen transmission (section)

===Airborne infection===
{{Main|Airborne disease}}
"Airborne transmission refers to infectious agents that are spread via droplet nuclei (residue from evaporated droplets) containing infective microorganisms. These organisms can survive outside the body and remain suspended in the air for long periods of time. They infect others via the upper and lower respiratory tracts."<ref name=nhmrc>{{cite web |author=NHMRC|author-link=National Health and Medical Research Council|date=2010|publisher=Commonwealth of Australia|url=https://www.nhmrc.gov.au/sites/default/files/documents/attachments/publications/icg-clinical-ed-guide.pdf |title=Clinical Educators Guide for the Prevention and Control of Infection in Healthcare |access-date=10 November 2020}}</ref> The size of the particles for airborne infections need to be < 5 μm.<ref name=":0">{{Cite web|url=http://apps.who.int/medicinedocs/documents/s16355e/s16355e.pdf|title=Prevention of hospital-acquired infections|work=World Health Organization (WHO)|url-status=dead|archive-url=https://web.archive.org/web/20200326160913/https://apps.who.int/medicinedocs/documents/s16355e/s16355e.pdf |archive-date=26 March 2020 }}</ref> It includes both dry and wet aerosols and thus requires usually higher levels of isolation since it can stay suspended in the air for longer periods of time. i.e., separate ventilation systems or negative pressure environments are needed to avoid general contamination. e.g., [[tuberculosis]], [[chickenpox]], [[measles]].{{cn|date=June 2021}}