Mine has come back at some point every week since Boxing Day, along with a headache and various other flu type symptom. In fact I felt awful when I woke up this morning.
As its viral then theres not much you can do other than to get as much rest as possible and generally look after yourself.
Its a real bugger.
I have been using Allens honey & pine syrup - which is revolting (tastes like toilet cleaner and makes me gag) but does bring some relief especially at night.