Thailand has delayed the rollout of the AstraZeneca's Covid-19 vaccine over reports of blood clots, despite there being no evidence of this.
The country's prime minister was due to kick off the country's vaccination drive by getting the jab on Friday. This has now been cancelled, reports the BBC.
The delay comes after a number of countries, including Denmark and Norway, suspended the use of the jab.
Around 5 million Europeans have already received the AstraZeneca vaccine.
Of this figure, about 30 cases had reported "thromboembolic events" - or developing blood clots.
The European Medicines Agency (EMA) said on Thursday that there was no indication the jab was causing the blood clots, adding that its "benefits continue to outweigh its risks".
AstraZeneca said the drug's safety has been studied extensively in clinical trials.