I'd say it applies for something like this (I know it's slightly outlandish, but it's the best I could think of! Lol):
Pretend you're at a party when somehow everybody simultaneously found out that the government just announced an urgent recall/public health scare for one of the food items everybody at the party had been eating.
The party host turns on the TV to find out why it was recalled, & somebody on TV says that it's because a few days ago, some odorless & tasteless but HIGHLY poisonous chemical somehow ended up being mislabeled at the plant, which meant it ended up in that food you all ate.
All the partygoers look at each other, & one of you says, "Is it/that (e.g. that horrible chemical) inside us?!" (Because you're all wondering if you did indeed truly just eat it, or maybe you're in disbelief that it's happening at all...)
Luckily, the host says, "Nope! Thankfully I purchased ___ a few weeks ago. So we didn't ingest any!"