A Lyme disease vaccine may finally be on the way. Why did it take so long?
The article says reported Lyme disease cases in Canada rose from 144 in 2009 to 5,809 in 2024, with 2025 preliminary cases at 7,105, citing PHAC data. It notes no human Lyme vaccine is currently approved. It describes Pfizer and Valneva’s co-developed vaccine PF-07307405 completing Phase 3 as of March 2026, and Moderna’s mRNA-1975 and mRNA-1982 in Phase 2.







