What's the link between colds and cold sores?

...Q. I have assumed that the wretched cold sores I get have been instead of the normal cold symptoms, which I haven't had for five years. This year, I tried Zovirax to treat the cold sores. It worked perfectly, but I'm now suffering from colds with a vengeance. Is it possible that preventing the cold sores from developing has forced the virus to appear as a common cold?...

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