About a quarter of Fraser Health’s full-time employees had not yet received the flu shot ahead of a Dec. 1 vaccination deadline and are now expected to wear masks in patient care areas of hospitals, long-term care homes and other health facilities. The health authority’s flu vaccination rate of 75 per cent as of Monday for full-timers will likely continue to improve as more health care workers get the shot in the weeks ahead, according to interim chief medical health officer Dr. Victoria Lee.