This collection presents a range of studies focusing on various aspects of the immune response. This compilation investigates the dynamic interactions between pathogens and immune cells, inflammation induction, immune cell receptor signaling, immune cell activation in response to antibodies, and their impact on other cells. Utilizing advanced techniques like flow cytometry, fluorescence microscopy, and immunoassays, these studies offer valuable insights into the complex immune system and its responses to infections, treatments, and stimuli.