No, it is not true. The first PML death on Tysabri occured in Elan's CD trial one year before PML was seen in any MS trial. Elan refused to allow BIIB to see the safety data on that CD trial until PML was seen by BIIB and then the FDA demanded that Elan do so.
what the hell are you talking about? The only PML that surfaced was when Ty was combined w/ other immune suppressants, period. There were ZERO PML cases in mono and the connection made to Ty was very, very weak. it was clearly the combo which BIIB insisted on running to protect Avonex.