Three Carriers of air-borne disease
3. Particulate Matter
Small air-filled bubbles 100 microns in size which can spread up to 20 feet from its source and remain suspended in the air for up to 45 minutes.
Transmission of aerosols can be direct (inhalation) or by indirect means. Indirect transmission is where the cough, sneeze, dental hand-piece, water purge, or cavitron transmitted aerosols end up on a hand, table top or bench top, door knobs, use after settling out.
Larger fluid-filled bubbles, up to 500 microns in size, travels several feet and lands in minutes
Solid Matter, greater than 500 microns, travels 2 to 3 feet and lands in seconds
Microbes can ride these particles as "hot air balloons," and in essence ride a space shuttle from planet to planet, with human being the planets.
A streptococci is 1 micron.
a virus is about 100 millimicrons