Cathy YesCTThe post-COVID-19 condition is systemic, with most organ systems potentially affected.
https://www.thelancet.com/journals/lanres/article/PIIS2213-2600(23)00239-4/fulltext
"This study found that 20% of COVID-19 survivors aged 18–64 years and 25% of those aged ≥65 years had at least one persistent symptom or organ dysfunction that might be attributable to previous COVID-19. [24 https://www.cdc.gov/mmwr/volumes/71/wr/mm7121e1.htm?s_cid=mm7121e1_w ]"
"A Canadian study showed that nearly 15% of adults in Canada with suspected or confirmed SARS-CoV-2 infection had symptoms beyond 3 months; persistent symptoms were more frequently reported by women (18·0%) than by men (11·6%). [25 https://health-infobase.canada.ca/covid-19/post-covid-condition/fall-2022-report.html ]
COVID-19 longer-term symptoms among Canadian adults – Fall 2022 Report – Canada.ca
Post COVID-19 condition, or long COVID are longer-term symptoms that some people continue to experience after the acute phase of COVID-19 has ended. The Government of Canada developed the Canadian COVID-19 Antibody and Health Survey (CCAHS), to learn more about these longer-term symptoms.