AI 摘要
Vaccines have averted 154M deaths since 1974, gaining 66 healthy years per life saved.
vaccinespublic_healthglobal_health正向情感
本摘要由 AI 生成，请从原始来源核实细节。
Vaccines have averted 154M deaths since 1974, gaining 66 healthy years per life saved.
本摘要由 AI 生成，请从原始来源核实细节。