The aerosol particles stay in suspension when the absolute humidity
is low. This is why influenza outbreaks occur during the winter. Once absolute humidity rises, the aerosol particles become unstable. They agglomerate, drop out of suspension and cease to be transmissible. “This
is well known,” Rancourt says. “It’s been known for a decade. It’s been
extraordinarily well-demonstrated by top scientists.”
The mid-latitude band is where you find the dry weather and the
temperature ideal for transmitting viral respiratory diseases. Viral
infections typically spread during the winter in the northern hemisphere, and in the summer in the southern hemisphere.
“I’ve come to the conclusion that the most prominent vector of transmission is these fine aerosol particles. Those fine aerosol particles will follow the fluid air. In a surgical mask, there
is no way you’re blocking the fluid air. When you breathe wearing a
surgical mask, the lowest impedance of airflow is through the sides and
tops and bottoms of the mask.
In other words, very little of the airflow is going
to be through the actual mask. The mask is only designed and intended to
stop your spitballs from coming out and hitting someone … If the flow
of air is through the sides, whatever molecules or small particles are carried in the air, are going to flow that way as well, and that’s how you get infected.