What serotypes are included in the quadrivalent meningococcal conjugate vaccines?

The quadrivalent meningococcal conjugate vaccines are designed to protect against four specific serogroups of Neisseria meningitidis, which are A, C, W, and Y. These serotypes are significant causes of bacterial meningitis and can lead to severe health complications, including death, particularly in certain high-risk populations.

By including these serogroups, the vaccine provides a broader defense against meningococcal disease compared to vaccines that target fewer serotypes. The selection of A, C, W, and Y in this vaccine formulation is based on epidemiological studies highlighting these serotypes' prevalence and impact in various regions, making it crucial for immunization efforts, especially for adolescents and young adults who are often at higher risk.

Other options include different combinations of serotypes, but they do not accurately represent the serotypes included in the quadrivalent vaccine. Therefore, the choice of A, W, C, and Y is the correct one because it precisely aligns with the composition of the current quadrivalent meningococcal conjugate vaccines available for public health use.