food contamination

How can I prevent my household from food contamination?

Is there anything I can do to help other people know about food contamination?

What effects does salminela have on your body?

What exactly is salminela?

What foods contain salminela?

ps. I am 11 years old please explain this on an 11 year old's grade level please( that also explains if there is any mispelled words0

                          thank you