Many people want to know who in their country will be the first to get the COVID-19 vaccine and where they are on the priority list. I am more interested in who should be the last to get the vaccine, and not only in rich countries that have early access to vaccines, but around the world.

Last in line should be people for whom there are no clinical trial data confirming the vaccine is safe and will prevent symptomatic, moderate or severe COVID-19 infection. For most of the available vaccines that means, for example, that youth under the age of 16 or 18 (depending upon the vaccine) should not be vaccinated.