[NeedMoreTea]

Now those I knew of, but they mostly use a pin prick or scratch, and then measure the reaction and swelling in the skin. Which if anything, reinforces the misunderstanding the allergen needs to get into the system directly. Though I hadn't encountered the patch tests wikipedia mentions.

The article and mention of handshake leave me with an entirely different impression of how careful I might need to be if I started in food preparation etc.