Dr. Andreas Kalcker, Clinical study shows Chlorine Dioxide CD is fully effective treatment against Covid-19 Journal of Molecular and Genetic Medicine Volume 15:S2, 2021 Download in english or spanish. https://andreaskalcker.com/en/coronavirus/estudio-clinico-con-dioxido-de-cloro.html or direct link https://drive.google.com/file/d/1AX2IOOP2CnOEFE9mfcspV_Mf96Ra76pU/view From Dr. Kalcker's email: You now have the opportunity to read the first clinical study multicentre carried out in several countries of Latin America which clearly demonstrates that the chlorine dioxide is a fully effective treatment against COVID-19.