Hi @jennywebster. This is a really incredible connection because brain tumors are on the rise and children are no exception. I actually had no idea about this before but looking into it, I'm amazed. This particular article really makes you re-think the "danger" of the measles:

"A patient with supposedly incurable cancer is now in complete remission thanks to a new experimental treatment she received at the Mayo Clinic: Killing cancer cells with massive doses of the measles virus."

https://www.pri.org/stories/2014-08-18/measles-becomes-biological-weapon-against-cancer