Seizures resulting from a fever-which are scary but harmless-occur generally at rates of 1 or 2 per 1,000 vaccine doses.

The study suggested that some people would require two vaccine doses.

The logical response from government now would be to focus on how to commandeer production capacity, and on how to make vaccine doses go as far as possible.

Based on the number of vaccine doses administered, the incidence of adverse events and serious adverse events did not exceed the expected value.

In a 2007 report, the global capacity of approximately 826 million seasonal influenza vaccine doses (inactivated and live) was double the production of 413 million doses.