All our games use a standard 52-card poker deck, which is shuffled before the start of each hand.
In Draw games, if the original 52-card deck is too low to draw the number of cards requested by a player, the remaining deck along with all previously discarded cards are shuffled together to make a new deck. This includes those discarded by players on the current drawing round.
After a reshuffle, players will not receive any cards they've previously discarded.