Mead only lasted 90 seconds in PNG’s 36-6 quarter-final loss to England on Sunday and was ruled out for the remainder of the match after failing his Head Injury Assessment.
“It was obviously very frustrating sitting on the sideline and watching. It was pretty hard to accept at first four or five hours after the game.
“As a player, you don’t ever want to miss a single game at a World Cup. But that stuff happens in rugby league so you have to learn to accept it.
“It would have been good to finish, but it wasn’t to be.
“I’ve learned to accept it and move on.
On the game, Mead said the whole team was shattered after Sunday’s loss, and breaking camp was very emotional.
“The boys were disappointed. But we can be better going forward.”
The 29 year old finished by saying he still wants to play on until the 2021 Rugby League World Cup.
“I still feel pretty young. Hopefully I’m still playing well by then.”