The simple answer to your question is, we don't know. And as you can see, if you look at the literature that's being published, I think that's the term that most people have agreed on for patients who continue to suffer chronic effects of the virus, even after the virus has been cleared. I think the term is called long haulers or long timers or something to that effect. But people who have had the disease, and then have recovered from the infection, but still suffer some sort of effects. I've seen estimates from tens of thousands to potentially millions of patients, who may be in that category, but I'm not sure anybody really knows. And part of the problem is it seems that, again, if you look at the literature that's being published, that a number of patients who fit that definition of long haulers are actually manifesting their chronic symptoms, several months after they have been cured of the disease, if you will. So just in the Wall Street Journal, two days ago, very large article about these kinds of patients, and they referenced patients who have the disease back in the summer, had a case that was treated, they seem to have recovered, and after the recovery, they were fine. And then two months later, they start to experience symptoms, not of the disease per se, but of long-term damage, chronic fatigue, loss of memory, shortness of breath, cardiovascular symptoms, like atria fibrillation, muscle cramps, all kinds of things. And I think this goes again, to what is evolving in the literature to be, I think, a consensus that this is a disease that affects the microvasculature of the body. But the effect in the lungs may be the first one that you see. So it's a long-winded answer Emanuela. But we're not exactly sure how many of these patients will be people who will have this long-term lung problem, but it seems like there will be people who will have long-term problems consistent with damage to their microvasculature, which should be susceptible to our cellular therapy treatment, independent of the organ impacted.