On June 26, 2014, the CDC recommended giving FluMist to healthy children between 2 and 8 years of age instead of inactivated injectable influenza vaccines but, 2 years later, in June 2016, the CDC withdrew its recommendation based on data which determined that the vaccine was completely ineffective in preventing influenza. On February 21, 2018, the CDC reinstated a new formulation of FluMist in advance of the 2018-2019 flu season. Vaccine effectiveness studies on this new formulation of FluMist have not been completed, therefore it is unknown whether the vaccine offers any protection from influenza. The CDC voted against recommending FluMist over the available inactivated injectable influenza vaccines but stated it could be considered as an option, if appropriate.
