Just a thought: how about prophylaxis for those of us who at risk?
Quercetin is high in concentration in blueberries, red wine, and green tea.
Probably matcha has a lot of it, it’s higher than regular green tea in antioxidants and whatever else is healthy in green tea. Lately the Grocery Outlets here have been selling Ito En brand Matcha powder, pretty decent price. Grown in Japan at the southern end, far from Fukushima.