Interesting, sunflower I wouldn't be suprised if your vaccination is at least part of the problem.

Yeah cytomegalovirus is fairly common, at least compared to simian cytomegalovirus. Simian cytomegalovirus is believed to trace back to contaminated batches of the polio vaccine. The polio virus used in the vaccine was grown in live monkey kidneys and some of these monkeys also had simian cytomegalovirus. SCMV is thought to be stealthy in the human body because it has lost any antigens on its surface which our immune system can recognize and label as an invader. So we have a virus but don't have the immune response to get rid of it. Not good.

-Colin