A study found that most individuals with long COVID continued to experience symptoms more than two years after initial infection. Only 1.8% reported resolution of symptoms, with the majority having worse physical and mental health outcomes. Participants with ongoing long COVID had significantly worse health status, and vaccination prior to long COVID development was linked to better health scores. The majority of long COVID patients may not experience complete resolution, with ongoing symptoms lasting over two years. Health outcomes were assessed using validated instruments, and the research was funded by the Centers for Disease Control and Prevention.