Top news
How AstraZeneca's vaccine was hit by flawed trials, defects and politics — but might still save the world
By Sarah Neville, Hannah Kuchler & Anna Gross
Covid: South Africa halts AstraZeneca vaccine rollout over new variant
Oxford Covid vaccine almost as effective against Kent variant, trials suggest
By Ian Sample
India, South Africa bid to ban vaccine patents blocked
By Ashutosh Pandey
All coverage
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
South Africa Says AstraZeneca's Covid-19 Vaccine is Not Effective at Stopping Variant
By Benjamin Mueller, Rebecca Robbins & Lynsey Chutel
Vaccines vs variants: the race to immunise the developing world
By Stephanie Findlay, Bryan Harris & David Pilling