Safety & efficacy

Vaccines have to be held to the highest standard of safety. Prior to their approval by the health authorities, our vaccines are tested extensively to ensure they are effective and safe.  Once in use, they are also continually monitored for safety through our pharmacovigilance system.

Sanofi Pasteur develops, manufactures and distributes vaccines that respect regulatory requirements and our company’s values. We are committed to making the safest and most effective vaccines possible available everywhere in the world.

For more information on vaccine safety oversight


  • Safety: Absence of harmful side effects resulting from the use of the product/vaccine
  • Efficacy : the maximum ability of a vaccine to produce effects or the intended result