Most people usually aren't instantly allergic to anything.

First, I understand you need an initial dose, an exposure. You body has to 'think about it a bit'.

The next time you have an exposure, you could show a reaction, but there's no guarantee.

An allergic reaction could come at any time, even after exposure for years. Consider beekeepers. They get stung, they get an itchy bump, and that's all. They may get stung hundreds of times over the next 20 or 30 years, no real problem. Then one day, they get stung and might go into anaphylaxis. If they're lucky, they get to treatment soon enough to reverse it.

But if they all worried about allergic reactions, we would never have any honey.

Sue