What percentage drop in lung function was observed in COVID-19 survivors after recovery?

The correct answer reflects the findings of various studies that have investigated the long-term effects of COVID-19 on lung function. Research indicates that survivors of COVID-19 experienced significant lung impairment, with a substantial percentage, typically estimated between 20-30%, showing reductions in lung function post-recovery. This decline can be attributed to a variety of factors, including inflammation, scarring of lung tissues, and the overall severity of the illness during infection. Understanding this percentage is crucial as it highlights the potential for ongoing health issues that can affect quality of life and necessitate follow-up care and rehabilitation for those who have recovered from the virus.