The questions and answers that follow are intended to assist in counselling about immunization; the wording and style are targeted at a general audience.
Key messages on vaccine safety in Canada
- The vaccines used in Canada are highly effective and extremely safe.
- Serious adverse reactions are rare. The dangers of vaccine-preventable diseases are many times greater than the risks of a serious adverse reaction to the vaccine.
- Health authorities worldwide take vaccine safety very seriously. Expert committees in Canada investigate reports of serious adverse events.
- There is no evidence that vaccines cause chronic diseases, autism or sudden infant death syndrome. Alleged links - for example between hepatitis B vaccine and multiple sclerosis - have been disproved by rigorous scientific study.