Dr David Beresford: How to avoid insect bites

Although our biting insects take a break in Winter, this week saw the shortest day of the year, so forgive us for looking ahead to the warm summer months. Are insects more likely to bite you when you're on the move, or when you're sitting down or standing still? Dr David Beresford, Professor of Biology at Trent University in Canada, has been looking into this very question.