The system you describe is exactly what is happening in the UK. There is a country-wide registry of everyone (already existing, because the NHS covers everyone

The system you describe is exactly what is happening in the UK. There is a country-wide registry of everyone (already existing, because the NHS covers everyone's healthcare) and everyone is assigned a place in line to get vaccinated based on their estimated clinical risk, from highest to lowest. Everyone gets a letter in the mail when their turn comes up allowing them to register for any of the currently open vaccine appointments at one central website. There's little to no fight to book slots because the appointment system is paced by the letters. When a whole risk group is nearly completely vaccinated (so far, that includes age 80+, 75+, 70+, and social care workers), then that group switches over to open registration to encourage any stragglers to get vaccinated. Anyone who has an invitation letter or is in one of the nearly-finished groups can get an appointment scheduled on a simple central website or by calling their local doctor: https://www.nhs.uk/conditions/coronavirus-covid-19/coronavirus-vaccination/book-coronavirus-vaccination/ https://www.nhs.uk/conditions/coronavirus-covid-19/coronavir... The priority queue of people left to vaccinate (and the logic behind it) is widely publicized and progress through the steps widely tracked in the media: 1. residents in a care home for older adults and their carers 2. all those 80 years of age and over and frontline health and social care workers 3. all those 75 years of age and over 4. all those 70 years of age and over and clinically extremely vulnerable individuals 5. all those 65 years of age and over 6. all individuals aged 16 years to 64 years with underlying health conditions which put them at higher risk of serious disease and mortality 7. all those 60 years of age and over 8. all those 55 years of age and over 9. all those 50 years of age and over It is estimated that taken together, these groups represent around 99% of preventable mortality from COVID-19. The UK is currently working on group #5 and catching any remaining people left in #1 - #4. My point is not that the UK is doing everything perfectly (obviously not). It's just that a mass vaccination system like this is doable and easily could have been done in the US if the government was more together over the last year. And organization works - the UK is not only significantly ahead of the US in number of shots administered per capita, but it also has a much higher percentage of age 70+ citizens reached (well over 90%) while the US vaccinations so far are more spread across age ranges.