Cut up some citrus fruit (lemons, oranges, satsumas, grapefruit etc) and put in a big jug together with any or all of the following:
ginger root cut up
whiskey (or whatever your favourite tipple may be)
a generous gob of honey
You could also add herbs and spices, as the fancy takes you, and then pour boiling water over the lot, brew as a tea, and drink as much as you can as hot as you can manage until you feel better.
You can top up the pot with fresh boiling water until the ingredients are exhausted, and then you need to chop up a few more ingredients and start again!
I am sure there are wonderful recipes like this from all over the world, but this one is mine and it will literally act like magic whenever you are ill. I cannot recommend it highly enough!
And a good recovery to you all!