CADTH is committed to supporting Canada’s health care decision-makers through this challenging and uncertain time.
For evidence, tools, and resources related to COVID-19, visit our COVID-19 Evidence Portal.
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which causes COVID-19, spreads when an infected person breathes out, sneezes, coughs, or talks, thus putting virus-carrying liquid particles into the air where they can infect other people. Larger particles fall to the ground rapidly, while smaller particles, sometimes called aero...
