Sarah aged 15 years has received a full course of Gardasil, the human papilloma virus vaccine in the school-based immunisation program to reduce her lifetime risk of cervical cancer. Describe the role...

Sarah aged 15 years has received a full course of Gardasil, the human papilloma virus vaccine in the school-based immunisation program to reduce her lifetime risk of cervical cancer. Describe the role of T Helper (CD4) cells following HPV vaccination and their role in promoting long term immunity