On April 13, NIH announced two new funding opportunities for ME/CFS research:  PAR-20-165, Research on Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) (R01 Clinical Trials Not Allowed) PAR-20-168, Research on Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) (R21 Clinical Trials Not Allowed) What is an R01?  What is an R21? R01 and R21 are two common types of funding