He is expected to give an update on the vaccine roll-out in the UK and outline plans for an Army-led vaccine distribution plan.
Mr Johnson will be joined by Brigadier Phil Prosser and NHS England boss Sir Simon Stevens.
He claims to have a plan to reach a target of vaccinating almost 14 million people by February 15.
Mr Johnson said that 1.3 million people in the UK – including 1.1 million in England – have now received the coronavirus vaccine.
Today’s press briefing is due to start at 5pm and we will have live updates below…