You know how the fear mongers have said brain fog is is a symptom of long haulers... Brain fog may be a symptom of lockdown regardless of Covid... https://www.theguardian.com/lifeand...-isolation-have-affected-our-minds-and-memory Brain fog: how trauma, uncertainty and isolation have affected our minds and memory After a year of lockdown, many of us are finding it hard to think clearly, or remember what happened when. Neuroscientists and behavioural experts explain why .... She knows of only two studies exploring the phenomenon as it relates to lockdown (as opposed to what some people report as a symptom of Covid-19, or long Covid): one from Italy, in which participants subjectively reported these sorts of problems with attention, time perception and organisation; another in Scotland which objectively measured participants’ cognitive function across a range of tasks at particular times during the first lockdown and into the summer. Results showed that people performed worse when lockdown started, but improved as restrictions loosened, with those who continued shielding improving more slowly than those who went out more. ... more at link...