Health Canada has directed provinces to withdraw and destroy remaining supplies of last year’s COVID-19 vaccines while it works to authorize updated shots, which is expected to happen in October, according to Ontario’s health ministry.

“Vaccines will be available once Ontario receives supply from Health Canada following their regulatory authorization of the new, updated vaccine formulation,” read a statement from Ontario spokesperson Hannah Jensen.

A notice posted on the federal government’s immunization guide says vaccines aimed at Omicron variant XBB.1.5 is no longer available in Canada. Updated shots, made to target the now-dominant JN.1 or KP.2 strains are expected to get the green light “in the coming weeks.”