I've eat 1 -2 days old sandwiches of peanut butter and a lot of other things (ham, chiken, chocolate, cheese...) without problems ;) 15-20 hours is not too much. I think, only raw eeg could be unsafe.
Part of the Smart grid glossary: The International Telecommunication Union (ITU) is an agency of the United Nations (UN) whose purpose is to coordinate telecommunication operations and services throughout the world. Originally founded in 1865, as the International Telegraph Union, the ITU is the oldest existing international organization.
Idiopathic thrombocytopenic purpura (ITP) is a rare autoimmune disorder, in which a person's blood doesn't clot properly, because the immune system destroys the blood-clotting platelets. We do not know the cause of ITP, but some kinds of viral infection may cause the immune system to malfunction and start producing antibodies that attack platelets.