https://www.npr.org/sections/health-shots/2022/08/22/1118788

Instead of waiting for results from human trials, the FDA asked the drug companies to initially submit only the results of tests on mice（老鼠）, as NPR reported last week. Regulators will rely on those results — along with the human neutralizing antibody data from earlier BA.1 bivalent booster studies — to decide whether to authorize the boosters.

这报道是几周前的，现在批准的variant vaccine是哪个？