Diseases, Conditions, Syndromes

How opening a window could help you avoid COVID

While billions are being spent on the search for a COVID-19 vaccine and treatment, experts say there may be something you can do to help avoid the virus that costs nothing: open the window.

Diseases, Conditions, Syndromes

Covid-19 intubation may be less risky than feared: study

Procedures like inserting or removing breathing tubes, which were thought to pose a serious danger of COVID-19 transmission to health workers, produce less aerosols than a normal cough, according to new research published ...

Medical research

Tiny airborne particles may pose a big coronavirus problem

At a University of Maryland lab, people infected with the new coronavirus take turns sitting in a chair and putting their faces into the big end of a large cone. They recite the alphabet and sing or just sit quietly for a ...

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Technically, an aerosol is a suspension of fine solid particles or liquid droplets in a gas. Examples are clouds, and air pollution such as smog and smoke. In general conversation, aerosol usually refers to an aerosol spray can or the output of such a can. The word aerosol derives from the fact that matter "floating" in air is a suspension (a mixture in which solid or liquid or combined solid–liquid particles are suspended in a fluid). To differentiate suspensions from true solutions, the term sol evolved—originally meant to cover dispersions of tiny (sub-microscopic) particles in a liquid. With studies of dispersions in air, the term aerosol evolved and now embraces both liquid droplets, solid particles, and combinations of these. The Earth atmosphere contains aerosols of various types and concentrations, including quantities of:

By far the most common aerosols in the atmosphere are clouds, which normally consist of suspensions of water droplets or ice particles of greater or lesser density.

Aerosols can be found in urban Ecosystems in various forms, for example:

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