On December 23, 2021, Health Canada authorized a shelf-life extension, from 7 months to 9 months, for SPIKEVAX / COVID-19 Vaccine Moderna 5 mL vials. This 2-month extension may be retroactively applied to vials that are currently on the market with printed expiry dates between February 2022 and August 2022, as long as the approved storage conditions have been maintained.