There's going to be a lot of options. Some people will go back to the pharmacy where they got their initial doses.

会有很多选择。有些人会回到他们之前接种疫苗的药房。

Sinovac has agreed to a similar scheme, with an initial 50 million doses available between July and September and more available for purchase later on.

科兴生物也同意了类似的计划，在第三季度提供最初的5000万剂疫苗，之后可提供更多采购疫苗。

That means that even a small initial dose can grow into an opposing army big enough to storm the bacterial barricades.