The vaccines protecting against rotavirus and pneumococcal disease are both barely more than a decade old. In the past, such new vaccines would take, on average, 15 years to reach developing countries – and then at prices that would place them beyond the reach of those most in need.
到目前为止，这几乎是个不可能的任务，至少在免疫阵线是如此。轮状病毒和肺炎球状菌疾病疫苗产生才刚刚十年。在过去，新疫苗平均需要15年时间才能到达发展中国家，且其价格远非最需要它们的人群所能负担。