Doesn't sound like fun, potentially some permanent damage/long term effects of infection:
Coronavirus: some recovered patients may have reduced lung function and are left gasping for air while walking briskly, Hong Kong doctors find
Some patients who recovered from Covid-19 have suffered reduced lung function and now experience problems such as gasping for air when walking quickly, Hong Kong’s Hospital Authority has revealed. The city has so far recorded 131 confirmed cases of Covid-19, including three fatalities. Of them, 74 patients have been discharged while one probable coronavirus
case has also recovered.
Dr Owen Tsang Tak-yin, medical director of the authority’s Infectious Disease Centre at Princess Margaret Hospital in Kwai Chung, said doctors had already seen around a dozen discharged patients in follow-up appointments. Two to three were unable to do things as they had in the past. “They gasp if they walk a bit more quickly,” Tsang told a media briefing on Thursday. “Some patients might have around a drop of 20 to 30 per cent in lung function [after recovery].”
...
A review of lung scans of nine infected patients at Princess Margaret found patterns similar to frosted glass in all of them, suggesting there was organ damage. But Tsang said the long-term effect on recovered patients, such as whether they would develop pulmonary fibrosis, a condition where lung tissue hardened and the organ could not function properly, had yet to be ascertained.
This is well-known when pneumonia is involved