What age group is particularly vulnerable to respiratory illnesses that can be prevented by vaccination?

Infants and toddlers are particularly vulnerable to respiratory illnesses that can be prevented by vaccination due to their developing immune systems and smaller airway sizes. During this early stage of life, children have not fully developed immunity to many pathogens, making them more susceptible to infections like influenza and respiratory syncytial virus (RSV). Vaccination can help build this immunity and protect them from severe illness.

In contrast, school-aged children and teenagers typically have stronger immune responses and are less likely to experience severe illness from respiratory infections compared to younger children. Adults over 65 certainly face risks with respiratory illnesses, but the question specifically asks about the age group that is particularly vulnerable due to their developmental stage, which aligns more closely with the characteristics of infants and toddlers. Therefore, this group is prioritized for vaccinations to reduce the incidence and severity of respiratory diseases.