HPV Risks (IMAGE) Medical College of Georgia at Augusta University Caption The risks associated with infection of HPV types 16 and 18, the most virulent strains, increase over time. Credit Medical College of Georgia Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.