The study investigated the connection between inactivated influenza vaccination and viral load in children under 6 in Japan over several flu seasons.
Researchers analyzed 1,185 influenza-positive children and found that the viral loads did not significantly differ based on vaccination status, with median values around 5.5 for all groups.
Key factors impacting viral load included specific influenza subtypes and children's temperature, indicating that vaccination status did not play a role in viral load differences.