Just a few puffs into each nostril, and you're protected against infection from nasty cold viruses - that is, according to claims made for many nasal sprays. Can they really do this?Well, not directly ...

Smelling is a complex and vital sense that shapes experiences, emotions, and memories. Humans are highly sensitive to odors, ...

Viruses and germs lurk everywhere: on surfaces that we touch and in the air. People catch most of them by breathing them in. “Many viruses like to enter through the ...