Dr. John Hollins, past Chair Canadian Club of Rome, submitted this oped letter to the Globe and Mail.
“André Picard may be right that during seven months, we’ve learned a lot of science about how the virus kills and how we develop immunity (or not). But while some public health authorities were changing their tune, we have not learned anything about how the virus is transmitted.
Transmission through air falls within the discipline of physics, not biology or medicine. The fundamentals were described in 1934 by William F. Wells in the American Journal of Epidemiology; his paper opens with references to Newton (1642-1727) and Stokes Law (1851). Wells also addressed the evaporation of very small drops of water, which leaves whatever solid material they contain as dry particles drifting in the air rather than dropping to the ground.
- Picard is very charitable in drawing the lesson that some public health authorities did not flip-flop, simply changed their guidance. They certainly changed their guidance, but that should not have been necessary.
John G. Hollins, Ph.D.