30多个科学家小组正在努力研制新冠病毒的疫苗。
More than thirty groups of scientists are working to develop a vaccine for COVID-19. (scientist)
委员会刻意选择大的起始组覆盖因为过去企图选择的小组是非常小的结果导致疫苗接种率下降。
The committee purposely chose a large initial group for coverage because past attempts at choosing groups that were too small resulted in drops in vaccine coverage.
为控制流行性脑膜炎提供疫苗国际协调小组已为大规模预防接种运动提供178,000份三价疫苗。
The International Coordinating Group (ICG) on vaccine Provision for Epidemic Meningitis Control has provided 178,000 doses of trivalent vaccine for a mass vaccination campaign.
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