The World Health Organization (WHO) said Friday there was no reason to stop using AstraZeneca's COVID-19 vaccine after several countries suspended the roll-out over blood clot fears.

WHO Spokesperson Margaret Harris told reporters at a virtual briefing in Geneva that the WHO's vaccine advisory committee was examining the safety data and stressed that no causal link had been established between the vaccine and clotting.

She said that based on data reported, no causes of death have been found to date and countries should continue using the AstraZeneca vaccine.

The European Medicines Agency also issued a statement saying there's no indication the vaccine is linked to an increased risk of blood clots and its benefits continue to outweigh its risks. It said the vaccine can continue to be administered while investigations continue.

A spokesperson for AstraZeneca also said that analysis of its more than ten million records has shown no evidence of an increased risk of pulmonary embolism or deep vein thrombosis.