Well maybe the vaccine was approved in the 70's and used in the US. In Europe though it wasn't. MenC came around the year 2002 (I remember, because they introduced it the year she was born) and MenB vaccine was approved in 2013. So looking at those dates, there is no way they can know the long term effects a vaccine can have. Especially not in conjunction with other vaccines. The sources you quote just make me laugh...