Dr. Gerry Predy, senior medical officer of health, apologized on Wednesday at a news conference. The agency reports directly to the Alberta provincial government.

Health officials have begun an investigation into the special clinic, which was held for the players and their families on Friday. The swine flu vaccine rollout was plagued by long lineups before it was shut down on Saturday.

The province is launching a revamped program on Thursday. Shots will be available for children and pregnant women.