Which vaccine is usually administered alongside the diphtheria and tetanus booster at 45 years?

The correct choice is the influenza vaccine, which is typically administered alongside the diphtheria and tetanus booster at around 45 years of age. The rationale for co-administering these vaccines is to ensure ongoing protection against diphtheria and tetanus while also addressing the risk for influenza, which can lead to serious complications, particularly in individuals with underlying health conditions or in older age groups.

Routine influenza vaccination is recommended annually, especially for adults and certain high-risk populations. This practice helps maintain immunity and reduce the incidence of influenza-related morbidity and mortality. By integrating the influenza vaccine with the diphtheria and tetanus booster, healthcare providers can enhance the efficiency of vaccinations and promote better health outcomes for individuals in this age group.

The other vaccines mentioned do not coincide with the recommended schedule for the 45-year mark. The measles mumps rubella vaccine is typically given earlier in life, while the human papillomavirus vaccine is primarily recommended for younger populations. The pneumococcal vaccine has its own specific recommendations that vary by age and risk factors, making the influenza vaccine the appropriate choice in this context.