Complex sentence: The sensitivity is for the indirect method is higher than the direct method since the primary antibody is not labeled, which creates a strong signal, and the higher quantity of labels for every fragment of the primary antibody is higher, which generates a more intense reaction.
Split into simpler sentences: The sensitivity is for the indirect method is higher than the direct method since the primary antibody is not labeled, which creates a strong signal. The higher quantity of labels for every fragment of the primary antibody is higher, which generates a more intense reaction.