priority health care and vulnerable groups. Health Secretary Jeane Freeman has previously set out plans to reach a million Scots by spring.
At Friday's coronavirus briefing, Leitch said there is still a lot of "unknown" elements to the range of vaccines and how many doses Scotland will get quickly.
But he stressed 99% of the mortality from coronavirus could be addressed by reaching the at-risk groups, not all under-50s.Asked if there's a timetable for the general population, Leitch said: "That fact is that's the biggest unknown because once we get to the under-50s we're going to need big numbers of vaccine, and that's why you can't get us to say a month or a date."That group will have to be more patient."The only approved vaccine so far in.