Parents who want to get a polio booster for their children are being told they're going to have to wait due to a nationwide shortage of the vaccine.

Alberta Health spokesman John Muir said that health risks aren't a concern because there is a two-year window in which children can get the shot.

"What people are being advised is that if they have children that are requiring their booster between the age of four and six to come back in November for that booster," he said.

"However at this time they can also get the measles, mumps and rubella shot if they want it now or they can wait a bit longer."

Muir said that parents are being advised to bring their children in for both shots.

The vaccine shortage is expected to be over in a couple of months.