James GallagherHealth and science correspondentGetty ImagesCould a different style of vaccine mark the end of the winter cold?A single nasal spray vaccine could protect against all coughs, colds and flus, as well as bacterial lung infections, and may even ease allergies, say US researchers.The team at Stanford University have tested their "universal vaccine" in animals and still need to do human clinical trials.Their approach marks a "radical departure" from the way vaccines have been designed f...