Some “healed” people, even many months later, refer that their life is no longer the same.

They survived the Covid-19 infection, but did not fully recover their health.

Some patients, whose conditions were not severe to the point of requiring hospitalization, report a persistent “shortness of breath”, brain fog, headache, muscle fatigue, joint pain, persistent loss of smell and damage to the heart, lungs, kidneys and brain.
Damage to the heart and lungs is also to be found in asymptomatic people.
Right now, we do not have a complete idea of the consequences of mild and asymptomatic forms of the disease, the virus being able to persist as a latent infection – such as chickenpox, where the virus lies dormant in the body and may periodically re-emerge as shingles (zoster), or become a chronic infection such as hepatitis C – causing long-term damage.
No one knows how long the symptoms will last, if COVID-19 will lead to chronic diseases, and if they can be prevented through the treatments supplied in the acute phase.

Anosmia (loss of smell) is a frequent symptom in Covid-19, indicating that the virus has entered the brain by climbing through the olfactory pathways. We don’t know if this is eliminated or remains dormant, in order to rise again after some time, in a sort of “Lazarus syndrome”, causing further damage.

Anosmia is a frequent symptom in Parkinson’s disease, and it often precedes the onset of the disease by many years.

The epidemic of lethargic encephalitis that overlapped the Spanish flu of the 1920s caused the survivors, after many years, to develop postencephalitic Parkinsonism.
The presence of antibodies to Coronaviruses that cause the common cold was demonstrated in the cerebrospinal fluid of patients with Parkinson’s disease about 20 years ago.

Content and thesis-related bibliography:
Fazzini, E., Fleming, J. & Fahn, S. Cerebrospinal fluid antibodies to coronavirus in patients with Parkinson’s disease. Mov. Disord. 7, 153–158 (1992), supporting the link between viral infections and Parkinson’s disease.