Six of the seven have been contacted, and all are well.

Six of the seven have been contacted, and all are well. Our best strategy [right now in Minnesota] is to observe what's going on and make sure our cases are being properly diagnosed.

However, these cases do serve to underscore the importance of making sure your immunizations are up to date for polio and other vaccine-preventable diseases,

For the general community in Canada, I would say that this is a reminder of the importance of keeping your children immunized,

Some people are very open, some people want to think about it, some people just say no.

We will continue to follow up directly with people who may have been exposed to the virus.