LONDON — Prime Minister Boris Johnson suggested a link between his weight and his susceptibility to covid-19, as he launched a new government anti-obesity program on Monday that will see junk food advertising limited and restaurants and pubs required to post calories for food and drink.

The campaign began with newspaper editorials and a social media blitz that included a video showing Johnson fast-walking in slow-motion — in a white button-down shirt and blue slacks — accompanied by inspirational string music and his dog, Dilyn.

“I was too fat,” Johnson says in the video, about his physique back in April when he was sick with covid-19, the disease caused by the novel coronavirus, and rushed to a hospital to be saved by supplemental oxygen.

He says he’d struggled with his weight for ages. But since recovering from the coronavirus, he has begun to focus more on exercise, starting his days with “quite a gentle run.” He notes that he has lost more than 14 pounds. And he encourages Brits to join him in his effort.