The government of Thailand has approved a popular Ayurvedic herb for therapeutic use to prevent severe disease from COVID-19 and curb inflammation. The use of Andrographis as a medicinal herb dates back to 3000 to 4000 BCE when Ayurvedic medicine began in India. According to some historical accounts, Andrographis is credited with stopping the 1919 Indian flue epidemic that followed on the heels of the 1918 Spanish Influenza outbreak. It has tradionally been used in Traditional Chinese Medicine and Ayurveda to clear heat and balance Pitta dosha.
I order my ayurvedic herbs and oils from Sewanti in Vancouver, Canada. Here is a link to their website, and they have organic Andrographis readily available.