15 Mar 2021 France, Germany and Italy are the latest countries to announce a temporary pause on the use of the Oxford/AstraZeneca coronavirus vaccine while reports of blood clots are investigated. Both the EU regulator – the European Medicines Agency (EMA) – and the World Health Organisation (WHO) say there is no evidence the vaccine causes blood clots and countries should carry on using it. Britain, Australia, Thailand and others say they have no plans to stop rolling out the AstraZeneca jab, which was developed by scientists at Oxford University. But the list of states that have decided to pause the use of the AZD1222 vaccine is growing longer. What is going on?