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Agonising choices abound as Covid-19 vaccine confronts humanity with next moral test
How to Develop It?The U.S government says the Covid-19 vaccine will be developed “at warp speed." But vaccines take years to develop, for good reasons, and none of the benefits can be realized if they are released before they are safe. A failed Covid-19 vaccine could even compromise confidence in other vaccinations, threatening a return of measles, polio and other plagues.Testing shortcuts are available but fraught.