Name national and international goverment agencies and private organization

Which one of these patients requires oral care less frequently than every two hours? a two-year-old who is tube fed. an 26-year-old female who is unconscious. a 64-year-old patient with high cholesterol. an elderly male patient who is vomiting. read question

To avoid food poisoning, perishable items should not be stored in the refrigerator for more than days.

How could you find out if that advice is based in scientific evidence?