I do mean to compare the lag re toxins and the lag re infections, because these response systems are complex and not severed from one another (both are mediated by mast cells); our system often has to react to foreign particles with a general defense, since it can't clearly distinguish in every case (or immediately) whether it's encountering a toxin or invader, or bacteria vs virus. No doubt errors are made both ways.

Celiac reactions also often have that 3-day lag, btw, very understandable because Celiac is a unique white-cell mediated autoimmune disease.