NewsAstraZeneca vaccine approved for use in seniors across Canada SHARE ON: Mohamed Fahim, staff Tuesday, Mar. 16th, 2021 Credit AstraZeneca.comThe AstraZeneca COVID-19 vaccine can now be given to seniors in Canada.The National Advisory Committee on Immunizations reversed its decision early Tuesday. NACI officials said three recent real-world studies provided evidence that the vaccine is safe for use in older adults and also gives protection against severe illness from the virus. In February, Health Canada greenlit the AstraZeneca vaccine for use in adults 18 years of age and older, however, within two days NACI recommended its use be limited to individuals between the ages of 18 and 64. NACI said new real-world evidence from the United Kingdom, which has been giving the shot to people 65 years of age and older since January, shows the vaccine is safe and effective in older adults.