WHO estimates that almost ten billion doses of influenza vaccine would be needed in order to protect everyone in the world against the seasonal flu or a future influenza pandemic. To reach this goal, WHO instituted the 10-year Global Action Plan for Influenza Vaccines (GAP) in 2006, aiming to decrease the global shortage of flu vaccines, increase seasonal vaccinations, and encourage vaccine research and development. As a result, in April, 2017, a GAP summary report to the WHO Director-General estimated that the maximum production capacity for influenza vaccine had increased from 1.5 billion doses in 2006 to 6.4 billion doses by the beginning of 2017 (assuming production facilities operate at full capacity, sufficient eggs are obtainable, and dose-decreasing technology is employed).

中文翻译：

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季节性和大流行性流感：全球疲劳与全球防备

世卫组织估计，将需要近百亿剂流感疫苗，以保护世界上每个人免受季节性流感或未来流感大流行的影响。为了实现这一目标，世卫组织于2006年制定了《十年全球流感疫苗行动计划》，旨在减少全球流感疫苗的短缺，增加季节性疫苗接种并鼓励疫苗的研发。结果，2017年4月，向世卫组织总干事提交的GAP摘要报告估计，流感疫苗的最大生产能力已从2006年的15亿剂增加到2017年初的64亿剂（假设生产设施在运转）在满负荷的情况下，可以获得足够的卵，并采用降低剂量的技术）。