"Vaccines will help us get through this winter ... we know that the protection that vaccines provide can weaken after six months ... Get a booster vaccine as soon as you receive an invitation," the British prime minister said on the government website.
Johnson stressed that COVID-19 vaccines are "life-saving" and completely safe.
During the day, a coronavirus infection in the UK was detected in 44 985 people, the total number of recorded cases of COVID-19 in the country reached 8 734 934.