So the same type of pathogen with the same exact antigens reinfects our body. Now, the type of response that our immune system will essentially elicit is called not a primary, but a secondary response. It's secondary because it's the second time our pathogen makes its way into our body. Now, the response will be different. The question is why? Well, because during the primary response not only was the adaptive immune system producing plasma cells but it was also producing memory cells.