For the 2017-2018 flu season:
• Only injectable flu shots are recommended for use again this season.
• The H1N1 component of 2017-2018 flu vaccines was updated.
• There is a quadrivalent recombinant influenza vaccine that is new for the 2017-2018 flu season. (Last season, only trivalent recombinant influenza vaccine was available.)
• For the first time, a cell-grown H3N2 vaccine reference virus was used to produce the H3N2 component of the cell-based vaccine, Flucelvax. (The remaining Flucelvax vaccine components were manufactured using egg-grown reference viruses.)
Learn more about what to know with the 2017-2018 Flu Season.
Flu Vaccination:Who Should Do It, Who Should Not
