Vaccines took months to deploy, delayed by fundamental problems (the time needed to develop them) and trivial ones (American shipments had to wait for the pallets carrying vaccines to receive a fumigation certificate).

疫苗的部署需要几个月，耽误的原因有大有小。大的比如说研发需要时间，小的比如说在美国的药物装运之前熏仓消毒也需要时间。