The COVID-19 virus is spread two ways. Airborne Spread Fomite Spread (on surfaces)
The most recent guidance from the CDC is that most COVID is believed to be airborne and in the form of aerosols. These aerosols, from coughing, sneezing, talking and just breathing are very small and light and can remain in the air for hours.
Most people get infected in their own home. A household member contracts the virus in the community and brings it into the house where sustained contact between household members leads to infection. This short video provides an overview of how COVID is spread. This 3 minute video provides insight.
Summaries and distillation of the current research that has been completed and broadly circulated are included in a study done by a PhD at UMass that provided insight in particular to how airborne spread occurs. A formula: Exposure to Virus x Time = Infection. Work by Erin Bromage PhD provides a very insightful look at exactly how the virus spreads and the extent to which you are at risk in a variety of settings. MORE