The goal of this observational study is to determine the feasibility of conducting a large-scale study on the effect of using osteopathic manipulative treatment (OMT) to treat patients with post-COVID-19 symptoms. The main questions it aims to answer are: 1. Is it feasible to conduct a large-scale study of the effect of OMT on patients with post-COVID-19 symptoms (based on how many patients agree to participate and how many complete the study)? 2. How much change in patients' post-COVID-19 symptom severity, quality of life, and ability to return to work can we expect to see following OMT? Participants will receive OMT as directed by their physician and complete questionnaires after every other OMT session. 1. Participants will complete questionnaires about their post-COVID-19 symptoms, quality of life, ability to return to work, and adverse events they experienced 3 days after every other OMT session. 2. Participants will be sent links to the questionnaires for 4 months or when their symptoms resolve, whichever comes first. 3. Additionally, participants will complete a follow-up questionnaire 2 months after they stop receiving OMT for their post-COVID-19 symptoms or 6 months after enrollment in the study, whichever comes first.