In the UK, Prime Minister Boris Johnson could receive a coronavirus jab live on air, Downing Street has suggested, as the British government seeks to enlist celebrity "influencers" to help encourage take-up of the vaccine.
Johnson's press secretary, Allegra Stratton, said it was not something he would "rule out" but added that he would not want to jump the queue.
Johnson, 56, is expected to get the jab in the eighth wave of vaccinations, according to the prioritisation list released by the Joint Committee on Vaccination and Immunisation (JCVI) on Wednesday.
The Queen, 94, is expected to be in the second group, although Downing Street said the issue was a matter for Buckingham Palace.
It came after Matt Hancock, the Health Secretary, said he would be happy to be filmed taking the vaccine if it was approved, adding that it would be "worth it" if it convinced others to get a jab.