"Even a mild or asymptomatic infection can harm the immune system. It can make you susceptible to new diseases that might not have bothered you before, but now, with your weakened immune system, these new diseases can find a foothold and attack you. Also, conditions that may have been dormant or held in check in your body by your immune system could resurface now that it’s weakened – things like shingles, HIV, or a resurgence of herpes. We’re seeing resurgences of all those things in the general population. We’re also seeing a resurgence in measles, whooping cough, and polio — all these things that we thought we’d gotten rid of. Whooping cough cases have been exploding in the UK. Our mass herd immunity is weakened and those diseases are all coming up again.
Beyond that, getting a COVID infection can double your risk of heart attack, increase the risk of stroke by three times, and double the risk of diabetes. All these things happen as a result of your COVID infection, and they persist for as much as two years, even if you had a mild or even an asymptomatic infection."
https://www.ineteconomics.org/perspectives/blog/from-long-co...