Denmark paused all vaccinations, while Austria and other countries paused usage of a specific batch that had been shipped around Europe. RELATED: AstraZeneca again cuts coronavirus vaccine delivery targets in Europe On Sunday, AZ said it had seen no confirmed quality issues in any batch distributed worldwide. AstraZeneca conducts more than 60 quality tests on the product, and independent labs run another 20 studies, the company said. No tests of any batch have "shown cause for concern." AZ plans to keep an eye on the issue.