There might be external effects happening at the same time here.
I grew up on a island with a lot of ticks. Being a kid and spending time on fields and in forests, we constantly had to remove ticks before heading home.
But now 2 decades later, visiting the island again as an adult and expecting having to do the same after walking around the forest, we didn't find a single tick on ourselves, when it would easily have been a couple of ticks each in the before-days.
So many parameters being different though, so hard to reach any conclusion, maybe my blood is less attractive, maybe we weren't physically intensive enough, maybe the wrong season, but maybe there are other chemicals at play too that wasn't there before.
I grew up on a island with a lot of ticks. Being a kid and spending time on fields and in forests, we constantly had to remove ticks before heading home.
But now 2 decades later, visiting the island again as an adult and expecting having to do the same after walking around the forest, we didn't find a single tick on ourselves, when it would easily have been a couple of ticks each in the before-days.
So many parameters being different though, so hard to reach any conclusion, maybe my blood is less attractive, maybe we weren't physically intensive enough, maybe the wrong season, but maybe there are other chemicals at play too that wasn't there before.