“Brain fog seems like such an inferior description of what is actually going on. It’s completely crippling. I am unable to think clearly enough to [do] anything … I can’t work more than one to two hours a day and even just leaving the house to get some shopping can be a challenge. When I get tired it becomes much worse and sometimes all I can do is lay in bed and watch TV.” ‘Brain fog’: the people struggling to think clearly months after Covid.