Histamine triggers vasodilation and leakiness in blood vessels during inflammation. Why would this be beneficial in fighting an infection by a pathogen?
1) increased migration of white blood cells to site of infection only
2) both increased accessibility of the pathogen to the blood and number of white blood cells
3) increased number of white blood cells only
4) both increased number of white blood cells and their migration to site of infection
5) increased accessibility of the pathogen to the blood only