How common long COVID is may depend on how it's defined

In Open Forum Infectious Diseases, Dutch scientists report that the definition of post-COVID condition (PCC, or long COVID) matters when estimating prevalence in a population. In people who had previously tested positive for SARS-CoV-2, the prevalence of long-term symptoms varied from 26.9% to 64.1%, depending on which of six different definitions was used, while in those who tested negative, the prevalence varied from 11.4% to 32.5%. The study was based on participant results from the Prevalence, Risk factors, and Impact …