Several countries have suspended the AstraZeneca vaccine because of severe adverse effects in a high percentage of patients. Denmark, Iceland, and Norway already announced the suspension of the vaccine on Thursday, March 11, and on Friday Bulgaria and Thailand joined an extensive list.

Bulgaria on Friday suspended the use of AstraZeneca CCP Virus (COVID-19) vaccine to combat the virus while it investigates the sudden death of a woman who received the vaccine this week.

Prime Minister Boyko Borissov, at a cabinet meeting ordered that the vaccine immunization will be suspended until the European Medicines Agency issues a written statement giving assurances of safety.

Bulgaria thus becomes the 10th European country to suspend vaccinations with the AstraZeneca-Oxford drug following reports of blood clots in some people.

Also on Friday, Thailand delayed the launch of the vaccine, citing concerns about people who received the injection and developed blood clots.

Thailand was supposed to begin its vaccination campaign on March 12, vaccinating Prime Minister Prayut Chan-o-cha and his Cabinet. 

But, the Post reported, Thai officials delayed the vaccine campaign to await the results of a safety investigation in Europe by the European Medicines Agency, where several people who received the AstraZeneca vaccine had serious and some even fatal effects.

Thailand received 117,300 imported doses of the AstraZeneca vaccine last week, but the country has purchased a total supply of 61 million doses, many of which will be produced locally by a company owned by Thailand’s king.

U.S. regulators have not yet licensed the AstraZeneca vaccine, arguing that the results of large-scale human trials are not yet known. 

As expected, AstraZeneca in a statement released on Thursday indicated that patient safety is its “top priority.” It added, “The safety of the vaccine has been thoroughly studied in Phase III clinical trials.”

Until now, the vaccines against the CCP Virus in use in the United States or Europe have been considered “safe,” however sources such as the Centers for Disease Control and Prevention (CDC) reported on February 11 that the number of deaths among those vaccinated against the CCP virus in the United States has risen to 1,170, in less than two months since voluntary reports began to be received.