To me the wording where "may" is used, says that it's not guaranteed that persistent impairment will happen. Then it's a matter of probability, much in the sam

To me the wording where "may" is used, says that it's not guaranteed that persistent impairment will happen. Then it's a matter of probability, much in the same way long-term effects of Corona is discussed. Perhaps the probability is mentioned in the actual paper, but i tend to lose interest whenever the wording include the word "may".