 It can affect almost any organ system. With COVID, we see not only the respiratory effects in the lungs, but we see issues with the neurological system, with the brain. We see issues with the cardiovascular system. It can cause some blood clotting and so on, which is why, at least for the initial year after a COVID infection, rates of cardiovascular illness, heart attacks, strokes, and so on are raised. That definitely persists for at least a year, and in some people, it may persist even longer.