Answer
Canned foods are often not sterilized properly through which Clostridum botulinum bacteria may survive and grow over time, which can cause infection.
Work Step by Step
As above
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.