I hope someone mentions some less obvious remedies I think mine was the usual stuff.

Always on the look out for something like this.

People also swear by echinacea

These twa powders are also often recommended (you can probably find something very similar). 
Again, I haven't tried anything. That works, but teas are nice anyway lol
 https://image.nostr.build/493efdbd02d9795916956d2a75da67f29ca7d203313647f60d8d767140acf595.jpg