Like most of the world, there are ticks, and there is Lyme Disease that the ticks carry.
I don’t want to scare you, but, living in Canada, I have been warned for 50 years about the dangers of ticks and Lyme disease.
I’m told the risk of Lyme is greater in the farming areas of Costa Rica, than in the Samara, Guanacaste, and from my research, the risk around our rental units are less than the risk ‘back home’ for me (Canada)
However, most people are more likely to be outside in Costa Rica than they are to be outside ‘at home’, especially when ‘at home’ is colder. So perhaps that means you are more at risk, or maybe the stats include that factored in. I don’t know!
Lyme is a terrible disease for many and you don’t want to get it, and if you are more outside when you are in Costa Rica than when you are home, then the risk is greater on that basis. The advice for Lyme prevention is about the same as for mosquitoes use repellent.
Beyond that, there is so much on Lyme, I’d refer you to: