close-up of traditional herbal medicine plant kariyat or green chireta andrographis paniculata flowers with green leaves on

alternative ancient andrographis antipyretic antiviral asian ayurvedic background bacteria benefit botany branch broad chireta closeup coronavirus covid covid19 creat cure cut drug flower forest fresh green health herb herbal infection isolated jone kariyat leaves medicine nature organic out paniculata plant remedy respiratory spectrum stem talai thai tract traditional treatment tree tropical virus white