Is a mask enough to protect you against flu?
Standard surgical masks appear to be just as good for doctors as more expensive models
The biggest US study yet to examine the superiority of N-95 masks over cheaper, looser-fitting masks has found they do not afford any better protection against respiratory infections.
The study, led by the Centers for Disease Control and Prevention, found no significant difference in the incidence of laboratory-confirmed influenza among healthcare workers randomised to wear either N-95 or surgical masks.
