A cautionary sign is placed outside of US Naval Hospital Okinawa exchange reminding personnel to practice social distancing to help fight against the spread of coronavirus disease (COVID-19) at Camp Foster on Okinawa, Japan April 3, 2020. [Photo/Agencies]

疫苗进展如何？免疫力可以长期预防感染吗？

"We need to learn to live with this virus," Dr Ryan said, warning that expectations that the virus could be eradicated, or that an effective vaccine could be ready, within months were "unrealistic".

瑞安博士说:“我们需要学会与新冠病毒共存。”他警告说，期望在几个月内消灭病毒，或者研制出一种有效的疫苗是“不现实的”。

He said it was not yet known whether recovering from the coronavirus would lead to immunity, or, if it did, how long that immunity would last.

他说，目前还不知道新冠肺炎痊愈后是否会产生免疫力，或者，如果会，免疫力会持续多久。

A separate study released on Monday by scientists at King's College London suggested that immunity to the virus may be short-lived.

伦敦国王学院的科学家本周一 Scientists at the college studied 96 people to understand how the body naturally fights off the virus by making antibodies, and how long these last in the weeks and months after recovery.

该学院的科学家研究了96名受试者，以了解人体如何通过产生抗体来自然对抗病毒，以及在痊愈后的几周或几个月里，抗体能维持多久。

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