Thailand on Friday delayed the use of the AstraZeneca made coronavirus vaccine as a precautionary measure after nine European nations, including Iceland, Denmark, Norway, Bulgaria, Estonia and Latvia, temporarily suspended the jabs over blood clot concerns.
The delay was based on the decision made by Denmark, Austria and others as a precaution, said the Thai health officials.
Austria while investigating death from coagulation disorders has stopped using a batch of AstraZeneca shots.
The other experts, however, stated there have been no reported cases of the vaccine causing blood clots or related problems elsewhere, including in Britain.
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Yong Poovorawan, an advisor to Thailand's vaccination program, said the delay, pending an investigation into the cause of the reported side effect, will not have a big impact on the rollout, the Associated Press (AP) reported.
Earlier on Thursday, the European Medicines Agency said that there was no indication of the jab causing blood clots and added its benefits continue to outweigh its risks.
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Aiming to inject 10 million doses a month from June, Thailand plans to cover at least half its population by the end of 2021.
Thailand began its vaccination drive earlier in February with an initial 200,000 doses of China's Sinovac and 117,000 doses of AstraZeneca.