What would be a situation in modern times where normal healthy people would want to get infected by a non-curable, but non-leathal, virus?

A virus that would have pretty nasty symptoms.

There is no compensation for getting infected.

The disease would not be easily spread, meaning that a person would have to "go out of their way" to get infected, most likely by injecting themselves, potentially even spending large amounts of cash just to aquire it on the black market.

There is no sign of any possible cure for said virus.

No fantasy elements.

What would be a situation in modern times where normal, healthy people would want to get infected by a non-curable, but non-lethal, virus?

A virus that would have pretty nasty symptoms.

There is no compensation for getting infected.

The disease would not be easily spread, meaning that a person would have to "go out of their way" to get infected, most likely by injecting themselves, potentially even spending large amounts of cash just to aquire it on the black market.

There is no sign of any possible cure for said virus.

No fantasy elements.