Oxford University scientists say their corona virus vaccine could be available as early as September.

牛津大学的科学家说，他们的冠状病毒疫苗最早可能在9月份上市。

At this week's WHO meeting, officials discussed the practicalities of testing Marburg virus vaccines in Equatorial Guinea.

在本周的世卫组织会议上，官员们讨论了在赤道几内亚测试马尔堡病毒疫苗的可行性。

It's been one week since the U.S. drug company Pfizer announced its corona virus vaccine appeared to be 90 percent effective, at least in early data from a Phase 3 trial.

一周前美国制药公司辉瑞公司宣布其研制的冠状病毒疫苗似乎有90%的有效性，至少第三阶段试验的早期数据是这样显示的。

When the resulting vaccine virus is given to a human, it will be unable to replicate enough to cause illness, but will still provoke an immune response that can protect against future infection.

当产生的疫苗病毒被给予人类时，它将无法复制到足以引起疾病的程度，但仍会引发免疫反应，可以防止未来的感染。