Limitations
Our single-Centre study has several limitations. Our study is longitudinal and assessed participants over the telephone, which the patients’ judgment could have influenced. This limitation can be overcome by using the widely applied Chalder Fatigue Scale at a post-COVID clinic setting and describing fatigue’s persistence at six months and beyond. Finally, this study was not free from the probability of bias, as the subjects had been familiar with the idea of post-COVID fatigue and other symptoms.