聽起來不是說疫苗本身有問題，是懷疑一個批次的生產/運輸/存儲環節是不是出了問題

"While the number was fewer than 10, the cluster of negative reactions prompted the California Department of Public Health to pause the administration of some 330,000 doses from the batch, which had been distributed throughout the state, until an investigation was complete"