Concentration difficulty and fatigue are hard to nail down and both symptoms of stress and depression, not exactly permanent tissue damage to the nerves or lungs. They are also symptoms that will be wider-spread the more you tell people they will certainly experience them if they survive covid, because they can be psychosomatically induced, so thanks for that. But in any case, people who catch a disease, even if it could've been prevented through better practices, shouldn't have the blame for that disease, including the deaths of others who catch it, laid at their feet. They are victims of a massive pandemic and accompanying policy failure, including crucial months where the highest authorities were dismissing masks as an effective measure. Imagine saying that sort of thing about the last very bad pandemic that hit America, that it was the fault of the sick for insufficient prophelaxis: you would rightly be considered a monster by people here.