What is the CDC's recommendation regarding seasonal influenza vaccination?

The recommendation for seasonal influenza vaccination by the CDC is that everyone aged 6 months and older should receive the vaccine annually. This is essential because the composition of the influenza vaccine is updated each year to match the circulating strains of the virus, as these strains can vary from season to season. Annual vaccination enhances immunity and ensures individuals are better protected against the most prevalent influenza viruses. The broad age range for vaccination—from infants to older adults—ensures that the entire population can help reduce the overall spread and impact of influenza, especially protecting vulnerable populations.

Other options do not align with the CDC's guidance. For instance, the idea of vaccination every two years is insufficient given the variability of the virus, and the recommendation for semi-annual vaccinations for high-risk groups is not standard practice, as the CDC advises annual vaccination for all. Additionally, limiting vaccination to those aged 65 and older overlooks the importance of immunization across all age groups, which is critical in managing public health during flu seasons.