One for the scientists - is it really necessary to use different chopping boards to avoid cross contamination? I do, mainly because when I was a student I was working in a restaurant and it was part of the health and safety training to use separate ones, and coincidentally I ended up buying a pack of pastic chopping boards from Ikea. Ever since i've kept doing it. However on TV, chefs seem to use big wooden chopping boards and just give them a wipe between uses of meat/veg. i'd love to use a wooden one and no more. My gran has had the same wooden butchers block type thing for 30 years and she seems fine!
whats the truth with this one?
TIA!