Currently, the vampires were hiding in the muggle world, where they could feast without being prosecuted from the magical authorities since the muggle world didn't have any laws regarding magical creatures, but it was dismaying the muggle government, which was understandable. Many vampires are taking blood packs from muggle hospitals, which makes it hard for the muggle healers to treat patients in case they needed a blood transfusion. Narcissa could remember from her father that the creatures in their world were able to cleanse their magical world from pests and other small magical animals that were proving to be even more dangerous, because of the diseases they were carrying. Vampires were able to stop the magical and non-magical bats in the wizarding world from getting out of control and attacking people.