It’s that time of year again – sunny days have been replaced by grey skies and rain and people sneezing and coughing on the tube. You know how it starts. A sore, scratchy throat. A persistent, tickly cough. Aches and pains. A runny nose. Fatigue. In the run-up to Christmas, it’s the last thing you need. And, it turns out that catching a cold or coming down with a bout ...
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