Bernard Durkan (Kildare North, Fine Gael) | Oireachtas source

I welcome our guests and thank them for attending. I have several questions. How does one know the use of vitamin D is optimal for a particular individual, if somebody was to ask me that tomorrow morning? Is there a possible downside? SARS-CoV-2 infection was referred to, so could we have more information on that? With regard to the condition known as Guillain-Barré syndrome, where the immune system attacks the nervous system, would a supplementation of the immune system lead to a greater chance of that condition occurring? I happen to know of at least five people who have suffered from that condition in the past two years. It is supposed to be a very rare disease, but as I know of maybe five or six people, it is not as rare as was thought. Those are my opening questions.