Some details about the pathogen P are: 1 it is spread through food and water 2 it inhabits the human intestines 3 it contains many genes that code for surface proteins 4 it alters its surface antigens 5 it may or may not cause an immune response. Which of these explains why it is hard to produce an effective vaccine for P?
- AP can mutate to produce different antigens.
- BP is a eukaryotic cell with many genes.
- CP is found in contaminated food and water and affects the gut.
- DPeople can be infected with P and may not show symptoms.