. Lymphocytes hold the memory of an infection and antigens and make certain antibodies to fight in opposition to the infection. Ticks, leeches, female mosquitoes, vampire bats, and an assortment of other organic creatures do take in the blood of other animals, but only bats are connected with vampires. https://bookmarkgenious.com/story20052186/a-review-of-blood-castle-mu-online