I had the flu jab late in November and suffered with localized pain at the site of injection for a couple of weeks. However, I have referred pain in that arm from my neck, so it could have been that.
On Christmas Day I mixed with family members who all were at different stages of having a cold, that night when I got home it felt a bit rough at the back of my nose, I immediately took a dose of echinacea tincture and followed with 3 more doses the next day. Pleased to say I'm still cold/flu free.
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"Been there, done that, got the t-shirt"
- CosmicRuss