The photo has been visible on Aniston’s Instagram account for less than 24 hours, but it has already been liked by (at the time of this article’s publication) well over 3.6 million people.

“I’m so glad he’s OK,” reads a comment from Rita Wilson, who – alongside her husband, Tom Hanks – was diagnosed with Covid-19 earlier this year.

“Wearing a mask is so easy.”

Michelle Pfeiffer added: “Baffling why this is so hard for some people.”

And Gwyneth Paltrow commented: “Right on, sister.”

It is worth remembering that it will be compulsory to wear a face mask in shops across England from Friday 24 July. Those who fail to wear a mask will face a fine of up to £100. This will be reduced to £50 if people pay within 14 days. And, as Aniston’s post has made all too clear, not wearing a mask – if you are not exempt from doing so – puts those around you at risk.

Jennifer Aniston shares graphic photo of friend on ventilator as she warns of Covid-19 dangers