Airborne transmission of the coronavirus can occur, especially in poorly ventilated and enclosed spaces, according to the CDC. VO Images/Getty Images hide caption
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COVID-19 transmission
As people spend more time together indoors with the changing of the seasons, could an air cleaner provide an added layer of protection against the transmission of the coronavirus by removing a percentage of viral particles from the air? Ben de la Cruz/NPR hide caption
Several influenza vaccines have been made in the form of a nasal spray, instead of an injection. The sprays confer two kinds of immunity to the recipient but can be difficult technologically to make. Tim Sloan/AFP via Getty Images hide caption
What A Nasal Spray Vaccine Against COVID-19 Might Do Even Better Than A Shot
