There are two arguments for the two dose policy : The first is that the priority is to protect the most vulnerable people first, at maximum immunity. The second is that the vaccine was shown to be highly efficient to protect vaccinated people from developing severe forms of the disease, but that right now it is unclear if vaccinated people may or may not be contagious In this case the vaccine would not offer significant collective immunity while being efficient at giving individual immunity, again suggesting a policy of “two doses first for the most vulnerable”.
None of these two arguments are coherent with a policy of vaccinating young healthy “frontline workers” first (or even medical workers), but we don’t except any governing body to have a coherent policy at this point...
(Exposure chance) * (infection consequence) = harm prevented by vaccination.
So, giving someone with a high EC, like a healthcare worker, a second dose could be more beneficial than giving someone with low EC and high IC a first dose, depending on the math. Note, also, that IC is higher for young healthcare workers than for people in other jobs.
There are two arguments for the two dose policy :
The first is that the priority is to protect the most vulnerable people first, at maximum immunity.
The second is that the vaccine was shown to be highly efficient to protect vaccinated people from developing severe forms of the disease, but that right now it is unclear if vaccinated people may or may not be contagious In this case the vaccine would not offer significant collective immunity while being efficient at giving individual immunity, again suggesting a policy of “two doses first for the most vulnerable”.
None of these two arguments are coherent with a policy of vaccinating young healthy “frontline workers” first (or even medical workers), but we don’t except any governing body to have a coherent policy at this point...
(Exposure chance) * (infection consequence) = harm prevented by vaccination.
So, giving someone with a high EC, like a healthcare worker, a second dose could be more beneficial than giving someone with low EC and high IC a first dose, depending on the math. Note, also, that IC is higher for young healthcare workers than for people in other jobs.