Around the world, more than 30 vaccines — out of a total of more than 165 under development — are now in various stages of human trials. Currently, eight vaccines have entered the final phase of mass human testing, including ones produced by Moderna in the United States, Oxford University and AstraZeneca in Britain and several Chinese companies.
Some of those Chinese companies have been accused of cutting corners themselves. One offered the vaccine to employees at the national oil company, while another has teamed up with the People’s Liberation Army to conduct human trials.
The Russian vaccine uses two strains of adenovirus that typically cause mild colds in humans. Scientists genetically modified them to cause infected cells to make proteins from the spike of the new coronavirus, officials have said.
The approach is similar to the one used in a vaccine developed by Oxford University and AstraZeneca that is now undergoing Phase III tests in Britain, Brazil and South Africa.
新冠病毒疫情反覆，衞生署上月向COVAX預訂足以供應本港約35%人口的疫苗，冀將來優先為高危群組接種。香港大學醫學院院長梁卓偉接受媒體訪問時指，現時大部分研發中的疫苗，主要作用為減輕死亡和嚴重併發症風險，並不會讓市民百分百避免感染。
15 Sep 2020
AstroZeneca and Pfizer are on front runner list
BBC 24 Nov 2020:
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