Efficacy of Andrographis paniculata extract treatment in mild to moderate COVID-19 patients being treated with favipiravir: A double-blind, randomized, placebo-controlled study (APFaVi trial)
Siripongboonsitti et al., Phytomedicine, doi:10.1016/j.phymed.2023.155018
https://c19early.org/siripongboonsitti3.html