very informative post about the vaccine supply chain
Read this and you will be able to understand things that escape the kind of journalists who write junk articles like "hospitals are running out of vaccines and nobody knows why because the states have a lot of unused vaccines" (see current NYT front page)
and the answer to that, AIUI is simply, hospitals are getting Phizer vaccine, which is shipped direct from factory, just in time, and sometimes there is a production glitch so expected amount is not available.
While meanwhile the state allocation is mostly Moderna, which is being distributed thru a bunch of companies that all have their own issues
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