Transfer CDG-ORY on Sun 13/11
my brother is flying HEL-CDG//ORY-PUF on Sunday. The Finnish foreign ministry has adviced travellers against using RER B right now.
Given the current situation, what's the best (safest) way to make the transfer on Sunday? FWIW, my brother speaks French so getting around shouldn't be a problem.
thank you for your replies
okko