Aerosols of some FDA-approved food coloring could deactivate airborne viruses.

In places where everyone wears a mask, cases of COVID-19 seem to be less severe. Evidence from labs and outbreaks suggests that masks protect not only others, but the person wearing the mask, too.

Miniaturized laboratory equipment is making it easier to identify airborne pathogens in the field, but there's still work ahead to be able to instantly determine if a room is safe or contaminated.

Testing large numbers of people regularly would reduce the spread of the coronavirus in the US. Laboratory testing is slow and expensive, but rapid screening tests could be the answer.

Some viruses can hide out in the body and reemerge at later times. Which viruses do this, and can the new coronavirus do this too?

The atmosphere has a microbiome of bacteria, viruses and fungi that travel around the world on highways in the sky.

The percentage of people who die from a coronavirus infection is an important number for public health experts to know. Recent estimates now put it at 0.26%, far lower than initially thought.

The evidence suggests the novel coronavirus evolved naturally.

More than 200 scientists wrote to the WHO, warning about aerosol transmission of the coronavirus. The WHO has since acknowledged the evidence but hasn't change its advice yet.