Yes. But I wanted to study all of them. That is how I reach the conclusion that quercetine cannot substitute IVM/HCQ if you are very sick. I will follow your advice with sugar. Vitamine D do not know how to proceed. The weather is here very nice and the sun shines a lot even in winter. I try to walk in the sun everyday but I do not know if that is enough. A test is annoying (blood test) so maybe I am taking supplements.