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[–] Fact_Checking_Alien 0 points 0 points (+0|-0) ago 

In my opinion what would've worked most of the time, and would've been easily implemented two decades ago, is temperature sensors. I've worked in food processing at various stages throughout earlier parts of my life, and what I can tell you from experience is that nobody properly checks or monitors food temperatures ever. People routinely forge the temperatures on shipping receiving to be within spec even when they're 10 or more degrees off.

What they should've done many years ago, long before this advancement, would've just been a simple thermal sensor that would change color if the food ever went outside the safety temperature levels. Because I swear that's the #1 reason people get sick from food these days.