Those looking for Pfizer doses for COVID vaccines for their first or second shots will be waiting for an unknown amount of time.

The Saskatchewan Health Authority says this week’s Pfizer shipments are delayed. Clinics that were set to offer Pfizer this week will now be offering Moderna.

While the SHA says those who received Pfizer for their first dose can receive a Moderna for their second, they will also be reaching out to 12-to-17 year-olds who cannot receive Moderna to change their appointments accordingly.

A list of walk-in and drive-thru clinics can be found here.