Droplet nuclei

Droplet nuclei are the residuals of evaporated droplets that are suspended in the air for long periods of time, even when the moisture has evaporated. They are typically 5 micrometers (µm) or less in diameter and can be inhaled into the respiratory system. Droplet nuclei are associated with the spread of infectious diseases.

Formation

Droplet nuclei form when moisture in a droplet evaporates, leaving behind the solid or liquid particles suspended in the droplet. These particles can be bacteria, viruses, fungi, or other substances. The size of the droplet nuclei depends on the size of the original droplet and the rate of evaporation.

Transmission

Droplet nuclei can be inhaled into the respiratory system, where they can cause infection. They are a common mode of transmission for diseases such as tuberculosis, measles, and chickenpox. The World Health Organization (WHO) also recognizes droplet nuclei as a potential mode of transmission for the COVID-19 virus.

Prevention

Preventing the spread of diseases through droplet nuclei involves controlling the source of infection, protecting the susceptible population, and interrupting the mode of transmission. This can be achieved through vaccination, wearing face masks, and maintaining good hygiene practices.

See also

• Airborne transmission
• Infectious disease
• Respiratory droplet

Droplet nuclei Resources
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