RecruitingDietary supplementLumbrokinase for Adults With Long Covid, Post-treatment Lyme Disease Syndrome, and Myalgic Encephalomyelitis/Chronic Fatigue SyndromeThis will be a pilot multi-arm clinical trial investigating the feasibility of Lumbrokinase (LK) as an intervention in three clinical cohorts: * Long Covid (LC) * Post-treatment Lyme disease syndrome (PTLDS) * Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)