Further changes to the Covid-19 vaccine roll-out plan are expected, as health officials meet this afternoon.

It's expected the National Immunisation Advisory Committee will recommend AstraZeneca be used only for over-60s amid concerns about rare blood clots.

That would require significant changes to the existing age-based vaccination plan.

However, just one in five vaccines due to arrive into the country over the next three months are from AstraZeneca.