A healthy concern for food safety and avoiding food poisoning is important.
Keep in mind that you won't get sick from undercooked food unless it is also contaminated food.
Pork is, along with beef, relatively safe to eat, cooked to medium or even medium rare.
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Very true, Andy.
I was initially concerned when he mentioned "red" on the inside, but I know that is very subjective. If the thermometer read 155 and you trust the thermometer, than pork should be fine, unless of course it is ground pork.
All grounds meats should be considered potentially hazardous, and cooked to a minimum of 165 for beef and pork, and 175 for poultry products.