Jules72 eurgh, this again - how it is relative to flu is mostly on a gradient relative to age. It’s less bad rising to about 35, then above 35 it starts getting worse.
Plus with vaccination for any age group it is no worse than flu.
There is also speculation that a significant amount of so-called “long covid” cases are actually previously low-lying/dormant conditions in some people e.g. herpes and Epstein-Barr Virus just being reactivated during the period of immunosuppression when ill.
https://www.telegraph.co.uk/health-fitness/body/could-dormant-viruses-causing-long-covid/
PS, along with age, obesity is the most significant factor for the severity of covid. Obesity is also a major factor in the severity of flu. Interestingly enough, similar to the increase in age, it appears the more obese one gets the more potentially fatal covid is relative to flu:
“We found obesity was a risk factor for the severity and mortality of influenza (ORsevere outcome = 1.56, CI: 1.28-1.90; ORmortality = 1.99, CI: 1.15-3.46). For COVID-19, obesity was a significant risk factor only for severe outcome (OR = 2.07, CI: 1.53-2.81) but not for mortality (OR = 1.57, CI: 0.85-2.90). Compared with obesity, morbid obesity was linked with a higher risk for the severity and mortality of both influenza (OR = 1.40, CI: 1.10-1.79) and COVID-19 (OR = 3.76, CI: 2.67-5.28”.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7779975/