Why Do We Still Vaccinate If Polio Has Been Elimin
标签: 乔纳斯·索尔克
根除脊髓灰质炎的里程碑
Milestones Towards the Eradication of Polio 经过 医学博
1954年脊髓灰质炎疫苗现场试验
The 1954 Poliomyelitis Vaccine Field Trial 经过 医学博士
Why Do We Still Vaccinate If Polio Has Been Elimin
Milestones Towards the Eradication of Polio 经过 医学博
The 1954 Poliomyelitis Vaccine Field Trial 经过 医学博士