https://warosu.org/biz/thread/60874680#p60880640
>Coughing, sneezing, sore throat, body ache, head ache and feeling ill.
Drink this.
https://www.yakultusa.com/products/

You can also find the Yakult product at Walmart, Meijer, in Asian grocery stores, and at several other major retailers in the refrigerated dairy section next to the yogurts and kefirs.
https://www.yakultusa.com/store-locator/
The bottles are tiny and easy to miss.

Yakult is made from the probiotic L. paracasei; strain Shirota.

>This strain of the species provides unique immune system–boosting effects, particularly effective against viral respiratory illnesses. Three human clinical trials demonstrate that intake of this microbe at 100 billion CFUs per day reduces the potential for viral illnesses by 50 percent and, should you develop a viral illness, abbreviates the illness by 50 percent. Because this effect appears to require high bacterial counts and the commercial source of the bacterial strain provides only 6.5 billion CFUs per bottle (sold as a product called Yakult), our prolonged fermentation with added prebiotic fibers provides the higher numbers for this effect.

>1 2-ounce bottle Yakult
>2 tablespoons prebiotic fiber (inulin or raw potato starch)
>1 quart half-and-half or other liquid

>In a medium to large bowl, combine the Yakult, prebiotic fiber, and 2 tablespoons of half-and-half. Make a slurry to ensure the prebiotic fiber does not clump. Stir until well mixed. Stir in the remaining half-and-half. Cover lightly (e.g., with lid or plastic wrap), place in your fermenting device, and ferment at 109°F for 36 hours.

For your fermenting device, use a yogurt maker, sous vide, or Instant Pot Pro (one that lets you set the temperature).

And just to show you I'm not just pulling this out of my ass, here is a PubMed Clinical trial about Shirota:
>https://pubmed.ncbi.nlm.nih.gov/26419583/

If you don't want to make yogurt, just drinking the Yakult will help.