The title wording seems a bit weird, but I suspect it's because most vaccines need 2 doses So 100 doses per 100 people may mean 100% of people with the first d

The title wording seems a bit weird, but I suspect it's because most vaccines need 2 doses So 100 doses per 100 people may mean 100% of people with the first dose, or some combination of people with 0, 1 or 2 doses