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.
The first rule of deciding when they’re justified, explains Arthur Caplan, the head of bioethics at the NYU Langone hospital system in New York, is that risks can be balanced against the prospect of better data.