C11 ER176 PET in Evaluating Neuroinflammation in Patients With Post-COVID Syndrome

Inclusion Criteria: * Mayo Clinic patients with a previously confirmed infection with the novel SARS-CoV-2 virus who have been seen in the Post COVID Clinic through GIM Integrative Medicine \& Health Section or approval by MAGPIES research group. * Be able to participate fully in all aspects of the study. * Have understood and signed study informed consent. Exclusion Criteria: * Lacking the capacity to consent. * Prisoners and institutionalized individuals. * Reports being currently pregnant, lactating, or are of child-bearing potential or are likely to become pregnant during the LLLT treatment phase and are unwilling to use a reliable form of contraception. o Acceptable forms include: * Hormonal methods, such as birth control pills, patches, injections, vaginal ring, or implants * Barrier methods (such as a condom or diaphragm) used with a spermicide (a foam, cream, or gel that kills sperm) * Intrauterine device (IUD) * Total hysterectomy or tubal ligation * Abstinence (no sex). * Those patients that have implants that would prevent them from having a PET Scan. * Patients that have claustrophobia. * Have a known history of any condition or factor judged by the investigator to preclude participation in the study or which might hinder adherence.