By Josh Michaud and Jen Kates
November brought some of the best news of the COVID-19 pandemic: strong evidence that novel coronavirus vaccines currently under development will work. That was never a forgone conclusion. But it is now almost certain that several different effective coronavirus vaccines will become available within the next few months.
Developing a vaccine is just the first step in a long journey toward ending the pandemic, however. Even more daunting tasks await policymakers and health workers after pharmaceutical companies ship the first doses out the door. To eliminate the risk of future outbreaks, as much as 70 percent of the world’s population will need to be immune to the coronavirus—through vaccination or infection and recovery. Given that only an estimated ten percent of the world’s population has had COVID-19 to date (with most infections concentrated in a relatively small number of countries), that leaves an extraordinarily high target for global
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