What percentage of letterboxers are now immune to the West Nile virus, having already been infected via mosquito bites? In reading up on the disease, it seems that the vast majority of people infected never have any symptoms, or they have flu-like symptoms for a bit and then get better, and they are then presumed to be immune to further infections, although the immunity may wear off over time. In thinking of all the mosquito bites I've had over the last decade (thousands), there must have been West Nile in at least one of those mosquitoes, right?

So what do you think your odds are of being immune to West Nile because you letterbox?

So what do you think your odds are of being immune to West Nile because you letterbox?

50/50! You're either immune or you're not!