This is a hot topic. Some researchers are reporting 100% of GBMs have cytomegalovirus. Other researchers are reporting none have it. I would love to see a roundtable discussion with both groups getting together, discuss the methods they use, and finally figure it out. It has profound consequences. Some early results of targeting CMV in small trials has showed some success, so I lean toward the group that says there is CMV in GBMs. More research is needed.