Why do foods seem to not have a refractory period when performing testing as is often the case with venom testing?

This is one of 2 important misconceptions about food anaphylaxis. There is actually good evidence of a refractory (anergic) period after anaphylaxis to foods, drugs, and peri-operative agents, but it is only about 7-10 days (and variable among individuals) rather than 4-6 weeks, as widely stated. It...