For how we live.
"Brain fog" is a lay term for trouble concentrating and remembering, not a disease. Common drivers include poor sleep, low mood, the menopause transition, thyroid or B12 problems, and the tail of an infection.
A real condition with a formal case definition, a measurable population-level burden, and — so far — no treatment proven to reverse it. What the studies do and do not establish.
Among 603 RECOVER participants, 118 were classified as likely having Long COVID. The primary analysis found no association with preterm delivery, and one secondary signal that only appeared in a sensitivity analysis.
Results posted to ClinicalTrials.gov show 15- and 25-day nirmatrelvir-ritonavir regimens produced no meaningful edge over placebo on cognitive, autonomic, or exercise-intolerance symptoms.
A 250-person randomised trial paired a wearable tracker with just-in-time energy-management messages. Post-exertional malaise fell in both arms, and the difference between them was trivial.