When Health Canada on Tuesday approved Moderna’s updated Spikevax vaccine – designed to target Omicron subvariant XBB.1.5 – health officials avoided labelling the latest shot a 'booster' during a technical briefing. Here’s why they say they’re dropping the word.

When Health Canada on Tuesday approved Moderna’s updated Spikevax vaccine – designed to target Omicron subvariant XBB.1.5 – health officials avoided labelling the latest shot a ‘booster’ during a technical briefing. Here’s why they say they’re dropping the word.