The 2019 publicly funded influenza vaccine has been upgraded to quadrivalent for the first time, but the start of the vaccine will be in mid-November, which is the latest in recent years, the main reason for the delay is the delay in the global vaccine production and supply schedule. 2019 publicly funded influenza vaccine start phase, the start of the vaccine schedule, the vaccination target lazybones, this article has a complete collation of when to start the vaccine, in the end, when to start the vaccine for pregnant women, preschoolers, elementary school, middle school, and high school students? Why is the vaccine delayed? The CDC said that this year's publicly-funded influenza