你怎么那么肯定根本就没有检测？on the basis that batches they tested carried a

“Washington — Scientists have backed the Brazilian drug regulator's decision to stop the import of Russia's Sputnik V coronavirus vaccine, on the basis that batches they tested carried a live version of a common cold-causing virus. Top virologist Angela Rasmussen told AFP the finding "raises questions about the integrity of the manufacturing processes" and could be a safety issue for people with weaker immune systems if the problem were found to be widespread.”

https://www.cbsnews.com/amp/news/sputnik-v-vaccine-covid-brazil-russian-vaccine-ban-efficacy-recombination/