I have been taking quercetin /bromelian 500/250, twice per day. There is strong evidence that this natural supplement will fight prostate cancer cells and also increase your immunity to the Coronavirus.
A canadian research institution and two renowned Drs. have been invited to start clinical trials with it in China. Also a Canadian family foundation has contributed a million dollars to the research.
I am sure some of our more informed members can share a clearer picture of this supplement, than I, but I am continuing to take it for protection for immunity to the virus and to kill cancer cells.
NOTE FROM YOUR MODERATOR
This is not to disparage anyone who is interested in quercetin or any other "this can prevent/cure/help Covid-19 and/or coronavirus nutraceutical BUT>>>> According to every doctor I've spoken to and all of the national health care websites, there is no medicine or food or herb or whathaveyou that can prevent or cure the Covid-19 coronavirus. There may be things you can eat or take over the counter that can ease symptoms. But for our "older male" community, the best thing you can do is self-isolate, wash hands and avoid touching body openings in your face and probably your penis (though I haven't found anyone talking about washing hands prior to masturbation). And, see your doctor as soon as you suspect something is up. There may indeed be something herb like that will prevent Covid-19, but, right now, no one on Earth can say that is true.