New Four-Dose Lyme Vaccine Shows About 70% Protection

Pfizer and Valneva announced phase 3 results for PF-0730740, a four-dose Lyme disease vaccine that achieved about 70% efficacy in preventing infection among people aged 5+ across the US, Canada, and Europe. The regimen requires four injections (two two months apart, then months five–nine, then one year later) and the vaccine is not yet approved; its impact on disease complications is unknown, but it could offer meaningful protection for those in endemic areas while continued tick-prevention steps remain important.