Final answer:
Yes, it is true that toxins like histamine can occur when foods are improperly stored at wrong temperatures, leading to foodborne diseases. The statement that allergies and autoimmune diseases result from an overactive immune system is also true. Antigens are substances that provoke an immune response, while allergens cause allergic reactions.
Step-by-step explanation:
Toxins, such as histamine, can indeed occur when foods are time-temperature abused, leading to the potential for foodborne disease. Foods that are not stored at the correct temperatures can support the growth of microorganisms that produce toxins. An example of such a toxin is histamine, which is released in allergic reactions and can also be produced by bacteria in improperly stored seafood. It is true that allergies and autoimmune diseases both result from an over-reactive immune system. Furthermore, it is true that sometimes only part of a pathogen is used to create a vaccine. This is how subunit vaccines are made, using pieces of the virus or bacteria to provoke an immune response without causing disease. Lastly, an antigen and an allergen are not the same thing; an antigen is any substance that can provoke an immune response, while an allergen specifically causes an allergic reaction.