The flu virus is changing in ways never seen before, increasing infections and raising concerns about vaccine effectiveness ...

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 ...

Being stuck on a flight for multiple hours, packed in with strangers, might lead to you feeling rundown or sick - here are ...