As the UK started rolling out the coronavirus vaccinations on Tuesday, Dr Hilary Jones said the day would go down in history.
But the Good Morning Britain star also issued a warning on air saying we are “facing a third wave if we are not careful”.
With Covid-19 restrictions being loosened for five days over Christmas, Dr Hilary suggested that he believed the rules were not “logical”.
On Tuesday’s programme he urged people not to get complacent, with thinking the vaccine will immediately bring things back to normal.
Despite the lesser rules this Christmas, Dr Hilary urged people to be careful when mixing with other households – after crowds gathered at shops and other places across the country following lockdown lifting last week.
The images of people gathering were slammed by many, with some including Dr Hilary fearing what impact this and Christmas gatherings may have on the R number and the transmission of the virus.
Hilary told hosts Piers Morgan and Susanna Reid: “V day is something that will come down in history, the 8th December 2020 when we were the world’s first to have the vaccine. I think it will go down in history.
“It is gonna change the course of the pandemic eventually, but eventually being the operative word.
“If you look around the world and at what is happening right now, we’re seeing rising rates again in Greece, Germany, Denmark, exponential rates rising in Wales and indeed in the UK.”
He went on: “We are not through this yet, we have got a weapon now but we’ve got to give it a chance.
“So I appeal to everybody, to just be careful and patient during this Christmas. We have seen crowds of people flocking together for the sales pre-Christmas.
“We have seen people desperate to get out there and gather with their families in three households which could be any number of people.
“It’s gonna be a huge mistake. We are facing a third wave if we are not careful, in January and February, because it can take several months for the vaccine to be rolled out to a sufficient number of people to make a difference with the R number.
Susanna interrupted though, to point out that the mixing of three households had been allowed by the government
She said: “But Dr Hilary that will be in the rules won’t it, the three households gathering at Christmas…”
Hilary then replied: “Yes it will, but it doesn’t mean the rules are logical.”
Good Morning Britain airs weekdays at 6am on ITV.