 It's really terribly suggestive that there's some relationship here. So this is a very fruitful line of inquiry. But I don't think we can jump from there to say that repeated infections mean you may have more antibodies, certain antibodies that could trigger long COVID. We just don't know that at this point. But the autoimmune hypothesis has been around for a long time. I think it's unlikely that it's going to account for all the cases of COVID.