If a billion people need two doses, that's two billion doses. One billion is halfway there, leaving one billion left.
Re:India Counting Down to 1B Doses
by quietbritishjim on Thursday October 21, 2021 @08:56AM
(#28943722)
The parent comment said
> So, about 1 Billion [people] ...
and then
> Out of that 1 Billion are almost done.
To me, they're saying "out of 1 Billion people needing the vaccine, 1 Billion people are almost done".
Whatever the detail of what they meant, "almost done" is an odd way to describe being only (just under) halfway through the process.
Assuming you mean 1b have had at least 1 dose, I don't think that's true. If 1b doses have been given, and ~300m people have had 2 doses (i.e. consumed 600m doses), that surely means ~400m doses were left. So a total of 700m people have had one or more doses.