I use Azelestine spray, better than any other, and can be taken as needed. works in 10-20 minutes.
Also red bell pepper chewed, dissolves the phlegm and clears the back of the throat. Try it!
I had 3 full doses of Moderna, last shot 20 months ago, Will never take any of the mRNA vaccines because the lipid nanoparticles penetrate every cell in the body and tigger numerouse unknow side effects.
If you are deficient in D3, and you will be unless you live in the southern states, your immune system is seriously comprimised. I take 5000iu of D3 and 100mcg K2 starting 4 months ago. Get rid of as much sugar as you can in your diet (like no processed foods with added sugar!) and you will see amazing results in every part of your body. I am 77 and walk 200minutes/ week on treadmill at 3.5-6% grade at 3mph. There is no magic bullet to body health, except getting rid of all excess sugars! Its literally poison, and buried in every processed food product you buy.