Definition of "quadrivalent" []

• Chemistry Having four valences. (adjective)
• Chemistry Having a valence of four; tetravalent. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Soldan and colleagues say that genital warts "exert a considerable impact on health services, a large proportion of which could be prevented through immunisation using the quadrivalent human papillomavirus vaccine"."
• "Cervarix is bivalent, protecting against two strains of human papillomavirus HPV that can trigger cervical cancer, but Gardasil is quadrivalent, protecting against four."
• ""Describe the effects of the quadrivalent human papillomavirus vaccine among women between the ages of 24 and 45 years.""