My friend Doctor Bob is full of good advice:
That settles it . I intend to spend the next few days gorging on lime pickle to ward off the malaise.
Hot curries in general help sweat things out by stimulating secretions from the linings in the nose & sinuses. Hence the chilli cure. Also cinnamon is an excellent antiviral and antibacterial. (Which is why you shouldn't mix cinnamon and live yogurt - it becomes cinnamon and *dead* yogurt.) The specific action of turmeric is as an anti-inflammatory - it is very good against arthritis for that reason.