by Teresa Bo
Nearly two dozen potential vaccines for the novel coronavirus are under various stages of human testing worldwide, and at least two are being conducted in Brazil - the country with the world's second-worst outbreak.
One is a Chinese-made drug that is being tested on 9,000 volunteers, the other is developed by Oxford University.
Testing is now under way and is expected to last for about three months.
Al Jazeera's Teresa Bo reports.
The post about “New COVID-19 vaccine trials under way in Brazil" first appeared on the Al Jazeera website.
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