I mean, no matter what it's a dice roll every time you get infected. Clearly your risk increases each time in that sense. Avoid the infection and you avoid the risk. Because there's so much research still ongoing, that's probably the safest way to frame things. I'm still hoping we'll figure out what things make a person more or less likely to get it. Considering the wide variation in symptoms and severity I doubt we'll have a treatment anytime soon.