A volunteer receives the Israel-developed anti-coronavirus vaccine at Sheba Medical Center in central Israeli city of Ramat Gan, Dec. 28, 2020. The second phase of the clinical trial for the COVID-19 vaccine candidate developed by Israel's governmental Institute for Biological Research was carried out on Monday. (Photos: Xinhua)

A volunteer gets a medical test before receiving the Israel-developed anti-coronavirus vaccine at Sheba Medical Center in central Israeli city of Ramat Gan, Dec. 28, 2020. The second phase of the clinical trial for the COVID-19 vaccine candidate developed by Israel's governmental Institute for Biological Research was carried out on Monday.

A volunteer receives the Israel-developed anti-coronavirus vaccine at Sheba Medical Center in central Israeli city of Ramat Gan, Dec. 28, 2020. The second phase of the clinical trial for the COVID-19 vaccine candidate developed by Israel's governmental Institute for Biological Research was carried out on Monday.

A volunteer gets a medical test before receiving the Israel-developed anti-coronavirus vaccine at Sheba Medical Center in central Israeli city of Ramat Gan, Dec. 28, 2020. The second phase of the clinical trial for the COVID-19 vaccine candidate developed by Israel's governmental Institute for Biological Research was carried out on Monday.

A volunteer receives the Israel-developed anti-coronavirus vaccine at Sheba Medical Center in central Israeli city of Ramat Gan, Dec. 28, 2020. The second phase of the clinical trial for the COVID-19 vaccine candidate developed by Israel's governmental Institute for Biological Research was carried out on Monday.