The minutes make it clear that it is too early to know how ill the Omicron variant will make those infected or how that might vary by age. They say the first indications of the likely impact on vaccines should come from laboratory studies over the coming weeks.
But the advisers note: "It is important to be prepared for a potentially very significant wave of infections with associated hospitalisations now, ahead of data being available."
They say that the earlier measures to reduce transmission are introduced, the stronger they are and the wider their geographical coverage, the more effective they will be.
"The situation could develop quickly over the coming weeks and decision makers may need to act while there is a high level of uncertainty including the potential need for stringent response measures," they say.