None of the vaccines is available in large quantities, developers said at the meeting: availability ranges from a few hundred doses in the case of the Sabin and PHV vaccines to a few thousand for Janssen's candidate.

开发人员在会议上说，没有一种疫苗是大量可用的：从萨宾和PHV疫苗的几百剂到杨森候选疫苗的几千剂不等。