A press conference will be held later in the day in Downing Street as the UK becomes the first country in the world to approve Pfizer and BioNTech’s Covid-19 vaccine.
The prime minister will provide more details and answer questions in the televised briefing number 10, which begins at 5 p.m.
Mr Johnson said it is “fantastic” news and tweeted, “It is the protection of vaccines that will ultimately allow us to reclaim our lives and get the economy back on track.”
The injection has been shown in studies to be 95% effective and works in all age groups.
The UK has ordered 40 million doses of the vaccine, enough to vaccinate 20 million people with two doses, 21 days apart.
About 10 million doses are expected to be available for use in the UK for priority groups, including health professionals, in the coming weeks, with 800,000 doses arriving next week.
A list of who will receive the vaccine first will be drawn up later on Wednesday.
A Department of Health and Social Care spokesperson said, “The government today accepted the recommendation of the independent Medicines and Healthcare Products Regulatory Agency (MHRA) to approve Pfizer / BioNTech’s Covid-19 vaccine for use.
“This follows months of rigorous clinical trials and an in-depth analysis of the data by MHRA experts who have concluded that the vaccine meets strict standards of safety, quality and effectiveness.
“The Joint Committee on Vaccination and Immunization (JCVI) will also shortly publish its latest advice for the priority groups receiving the vaccine, including nursing home residents, health and care workers, the elderly and the clinically extremely vulnerable.”
They added: “The vaccine will be available across the UK from next week. The NHS has decades of experience delivering large-scale vaccination programs and will begin conducting their comprehensive preparations to provide care and support to all who qualify for vaccination.
“To further the success of the vaccination program, it is vital that everyone continues to play their part and adheres to the necessary restrictions in their area so that we can further suppress the virus and let the NHS do its job without being overwhelmed. turn into.
“Further details will be outlined shortly.”