An observational analysis reviewed 54 studies and two medical record databases with data for 1.2 million individuals, to determine how many people experienced at least 1 of the 3 self-reported Long COVID symptom clusters 3 months after infection. The results indicate a Long COVID rate of 6.2%: 3.7% for ongoing respiratory problems, 3.2% for persistent fatigue with bodily pain or mood swings, and 2.2% for cognitive problems.