A steady increase in confirmed influenza cases in Calgary has prompted Alberta Health officials to encourage people to get immunized during the holidays.

Alberta Health Services says there has been a steady increase in cases in the Calgary area and 23 were reported just in the last two days.

In the Calgary zone there have been 148 lab confirmed cases of influenza to date and 65 people have been sent to hospital.

Four mass immunization clinics are operating in the city right now and the vaccine is free to all Albertans six months of age and older.

The four Calgary clinics will close at 6:30 p.m. on Saturday, December 21.

The Brentwood Village Mall and South Calgary Health Centre clinics will reopen on December 27 and 28 and January 2, 3 and 4 and are scheduled to operate until the end of March.

Local pharmacies and family physician offices can also administer the vaccine.

For complete details on clinic locations and hours, call Health Link Alberta toll free at 1-866-408-5465 or visit the Alberta Health Services website.