I've been certified as a food handler for many years now. This just means, I've taken the courses and tests to be able to work in a commercial kitchen. I know the laws and rules here in the state of California.
I also know how food bacteria grows and how many days leftovers are good for. I can and do throw out leftovers once they've hit their end date. I'll also throw away perishable food that has been sitting out too long.
This last week I was out of town and eating food prepared by others. Yesterday afternoon I came down with food poisoning. I really am careful about what I eat and am bummed that something I ate gave me this dreadful poisoning.
Thankfully, I know by tomorrow, I'll be feeling better again.