When positive coronavirus test rates in a community drop to this level, it’s a good indicator that the virus is not actively spreading:

Which of the following activities would be most likely to expose you to coronavirus?

True or false? The number of daily reported coronavirus cases around the world is now dropping.

The number of reported coronavirus cases in the United States now exceeds:

Reported cases of coronavirus are rising in all of the following states except:

When health officials do contact tracing for viral exposure, they generally look for someone with whom you’ve been in close contact for how long?

Researchers are exploring the links between vitamin D and the risk of Covid-19. All of the following foods are good sources of vitamin D except:

True or false? In a properly maintained dental office, dentists are at higher risk of coronavirus infection than their patients.