Good old fashioned chicken soup - get some chicken bone broth, or simmer a chicken carcass overnight, drain it (keeping the liquid, not the bones - I once poured the liquid away in a cold-induced stupor) then either make a trad chicken soup with barley, leeks, carrots, herbs, shredded kale etc or a chicken noodle soup with chilli, garlic, ginger, lemon, spring onions and shredded chicken.
Hot toddies to bring down infection: slice a lemon and a peeled cube of ginger, pour on a pint of boiling water, add a few cloves, a flat dessert spoon of turmeric powder and a heaped dessertspoon of honey, and stir. Let it steep for about 5-10 mins. Stir it again before you pour, as the turmeric settles. Turmeric is a bit bitter and gritty but very good for calming inflammation. the other ingredients are soothing.
Rest as much as possible. Apart from making soup and toddlies - everything else should be 2-minute dinners - filled pasta and pesto, beans on toast, banana custard - zero effort stuff. Let DC watch TV while you rest.