The Winnipeg Regional Health Authority is opening two clinics this weekend for H1N1 vaccinations. (CBC)

Two H1N1 vaccination clinics in Winnipeg will be open on Saturday.

It will be the first time since the mass immunization campaign started on Oct. 26 that clinics have opened during weekend hours.

Vaccinations will be done at the University of Manitoba, on the second floor of the University Centre, and at the Philippine Canadian Centre of Manitoba, at 737 Keewatin St. The clinics will be open from 9:30 a.m. until 4 p.m.

Winnipeg's 12 vaccination clinics reopened Thursday morning after being closed since last Friday evening due to a shortage of the product, but the province has since received several more batches.

That prompted health officials to expand the priority list of those who should get the shot before the general population. All children under the age of 18 were added to the list Thursday. Before then, only those aged six months to five years were considered at priority risk of becoming seriously ill.

100,000 cases in Manitoba

Health officials said Thursday the number of lab-confirmed cases of H1N1 in the province has spiked, with 225 new ones confirmed in the past week, bringing the total of recent cases to 291, in addition to roughly 900 confirmed cases from the spring outbreak of swine flu.

But Dr. Joel Kettner, the province's chief medical officer of health, said the actual number of Manitobans who have contracted the virus is likely 100,000.

He told CBC News on Friday that he has not released this number publicly before but feels confident doing so now.

He also stressed that the vast majority of illnesses have been very mild, and people don't bother to get tested.

There has been one death this fall attributed to complications from the illness. There were seven deaths in the spring outbreak.

More vaccine coming

This week the province received 36,500 doses of vaccine with adjuvant — chemicals that boost a vaccine's effectiveness —- and distributed them to regional health authorities. Provincial officials are expecting another 43,500 doses of adjuvanted vaccine next week.

In addition, Manitoba has received 9,200 doses of an Australian-made adjuvant-free vaccine for pregnant women, health officials said Thursday.

And 39,900 doses of a Canadian-made vaccine without an adjuvant have also arrived in the province. That vaccine has not yet been licensed but is expected to be soon, health officials said.

In preparation for that, the vaccine was shipped Thursday to the regional health authorities, so they have it on hand once the approval is given.

The province's priority list includes the following:

• Children six months to age 17.
• Anyone of aboriginal ancestry (First Nations, Métis or Inuit).
• Disadvantaged individuals (for example, the homeless).
• People living in remote or isolated areas.
• People under 65 with a chronic medical condition or other risk including obesity, substance abuse or alcoholism.
• Anyone with a weakened immune system or those who live with or care for them.
• Those who live with or care for infants under six months old.
• Single parents or anyone solely responsible for a dependant.
• Health-care workers and medical first responders.
• Pregnant women.

Across the province, close to 200,000 shots have been given since clinics opened on Oct. 26.

As of 4 p.m. on Thursday, 106,302 people had received shots in Winnipeg. Clinics operated by the Winnipeg Regional Health Authority are scheduled to run until Dec. 4.

Regular hours for the clinics are Monday to Thursday from 9:30 a.m. to 8 p.m. and Friday from 9:30 a.m. to 4 p.m.

Locations of the Winnipeg clinics are on the map below. Clinics outside the city can be found by visiting Manitoba Health's H1N1 website by clicking the link on the top right of this story.