Simple licorice (lemn dulce) is highly active against SARS CoV and novel Covid 19

I advise to have 1 cup of tea twice a day to prevent this infection as well to improve breathing and to decrease mocking cough .

https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(03)13615-X/fulltext

https://www.ema.europa.eu/en/documents/herbal-report/final-assessment-report-glycyrrhiza-glabra-l/glycyrrhiza-inflata-bat/glycyrrhiza-uralensis-fisch-radix_en.pdf

Recent studies shows that Glychirrizin prevents progression and fatal complications as lung injury https://www.frontiersin.org/articles/10.3389/fimmu.2020.01239/full

Recommended dosage if tea -5 gr (1 tea spoon) on 200 ml infusion  every 8 hours for affected, 200 ml infusion for prophylactic once a day.

Or 300 mg every 8 hrs in capsules if there are respiratory symptoms and 150 mg per day for prophylactic.

In Otopeni is found in plafar inside the market as a tea and Igazym tablets or online

https://www.camaraculeacuri.ro/suplimente-alimentare/igazym-colostrum-lysosyme-pt-g%C3%A2t-20cpr-lemn-dulce-pedersen-medical.html

Also Lemn dulce by Hofigal 400 mg every 8 hrs for 5 days with control of blood pressure and potassium is recommended to have 1-2 tab of Panangin per week to avoid low potassium.