- Would you get infected with COVID-19 on purpose for a vaccine trial? 12 News
- What is ‘human challenge’ that UK cleared to speed up Covid-19 vaccine trial? Hindustan Times
- UK to conduct 'first of its kind' human challenge trial to provide insight into COVID-19 WION
- AstraZeneca shares turn negative after Brazilian health authority says volunteer in Covid vaccine study dies CNBC
- UK study begins human trials KTNV Channel 13 Las Vegas
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