With the emergence of the new Omicron strain of Covid-19, the government is encouraging Brits to book their Covid booster vaccine as soon as possible.
Boris Johnson has set the challenge of offering all adults booster jabs over the next couple of months. And he said temporary vaccination centres will pop up "like Christmas trees" across the country.
Meanwhile, Health Secretary Sajid Javid has said that the booster programme was being "put on steroids" to ensure everyone gets their booster jab in time.
It comes as new restrictions have been put in place to curb the spread of the Omicron strain of Covid-19 - including new mandatory face masks on public transport and other settings.