How flavonoids in cannabis, spinach, and other plants affect COVID-19 COVID-19, a virus, has proven humanities vulnerability. Cultures have been shaken and politicians have had to admit their wrongs and… By hempcbdtimes , in COVID-19 flavonoids Kaempferol lopinavir Marijuana News protease inhibitor quercetin ritonavir SARS-CoV2 spinach , at April 25, 2020