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Brazil COVID-19 vaccine trial continues despite volunteer death
Vaccine deal allows AstraZeneca to take up to 20% on top of costs
By Donato Paolo Mancini & Clive Cookson
Children may need to be vaccinated against COVID-19 too. Here's what we need to consider
By Ketaki Sharma, Nicholas Wood & Kristine Macartney
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Volunteer in AstraZeneca Covid-19 vaccine trial dies in Brazil
By Sara G. Miller & Laura Saravia
COVID vaccine: Children left out of clinical trials, until now
By Karen Weintraub
Coronavirus vaccine volunteer in Brazil's AstraZeneca trial dies -- but authorities say trial to continue
By Jo Shelley & Jacqueline Howard
Oxford Developed Covid Vaccine, Then Scholars Clashed Over Money
By Stu Woo & Jenny Strasburg