How AstraZeneca's vaccine was hit by flawed trials, defects and politics — but might still save the world
By Sarah Neville, Donato Paolo Mancini & Hannah Kuchler
Western countries have 'hoarded' Covid vaccines. Africa is being left behind as cases surge
By Eoin McSweeney & Nyasha Chingono
Not recommending AstraZeneca vaccine for the elderly risks the lives of the most vulnerable
By Jonathan Pugh & Julian Savulescu
Vaccines vs variants: the race to immunise the developing world
By Stephanie Findlay, Bryan Harris & David Pilling