If the ham was supposed to have been refrigerated it and you left it out for 12 hours, then you mishandled the food. Without additional information, no food safety person is going to tell you it is safe.
Four hours at room temperature after that it begins to spoil.
Yes it can spoil with out refrigerated.
No, it would not be safe. No meat, whether raw or cooked, should be left unrefrigerated for more than two hours.
Meat should never be left unrefrigerated over two hours, whether it it cooked or uncooked.
several hours
4-hours is not a problem.
No. It should not be left at room temperature for more than 2 hours.
Breast milk is safe to consume when left unrefrigerated for up to 4 hours. After that, it should be discarded to prevent bacterial growth.
2 hours at the most
No, no meat is safe to eat if left out for 24 hours.
Philadelphia cream cheese should not be left unrefrigerated for more than two hours to prevent spoilage and potential foodborne illness.
No, meat left unrefrigerated more than two hours is not safe to eat. In that amount of time, bacteria has started to grow and could cause food borne illness.