The pledge to jab 1m adults a day has still not been hit, and means 2.1m adults must receive a booster every day – including on Christmas Day an Boxing Day – if the target is achieved.

Australia will not further shorten the gap between the second and third doses of the Covid vaccine despite health officials admitting the country’s latest coronavirus crisis is ‘evolving rapidly’.

The Transport Secretary said nations including G7 members like the US, France and Italy, all popular with millions of UK tourists, were likely to make it an entry requirement in 2022.

Boris Johnson last night appealed for an army of volunteers to deliver the Government’s ‘national mission’ of getting Covid booster jabs to every eligible adult in England by the end of the month.

Boris Johnson has announced he is rapidly speeding up the UK’s coronavirus booster jab rollout as he warned the country: ‘There is a tidal wave of Omicron coming’.

Australians will reportedly be able to for their first Covid booster shot just five months after their second jab with the mandatory waiting period was brought forward from six months.

Daily data from the Department of Health shows 19.4million booster jabs have been given out across the UK, with 420,910 administered in the last 24 hours.

Professor Saul Faust, who led the new study, said six different vaccines proved safe and effective as booster shots for people who had received two doses of AstraZeneca or Pfizer/BioNTech.