What should Aiden's father be informed if Aiden hasn't received the influenza vaccine before?

The recommendation that Aiden needs two doses of the influenza vaccine, spaced four weeks apart, is based on guidelines aimed at young children and first-time vaccine recipients. If Aiden has not previously received the influenza vaccine and is under the age of 9, the Centers for Disease Control and Prevention (CDC) advises that he should indeed receive two doses in his first year of vaccination. This initial two-dose regimen is essential to ensure that he develops adequate immunity and protection against the influenza virus.

The first dose helps prime his immune system, while the second dose, administered at least four weeks later, boosts the immune response. This approach is particularly important for young children, as they have a higher risk of complications from influenza and may not have enough immune memory to respond effectively to a single dose.

For children who have already received the influenza vaccine in prior seasons, only one dose is necessary each subsequent year. The recommendation for two doses is specifically for children who are receiving the influenza vaccine for the first time or have only received one previous dose in a prior season.