Fans are stunned over ABC newsreader Joe O’Brien’s muscular arms

Whilst getting his Covid-19 vaccine, ABC newsreader Joe O’Brien left fans stunned at how buff he is.

ABC newsreader Joe O’Brien proudly showed off his second AstraZeneca vaccine photo on Twitter.

“Just got my second AZ jab,” he wrote.

“Brought forward to 7 weeks. This is our path out of this. And for everyone wondering who my Nurse Princess was that I booked in with .. here she is .. proudly wearing a blue hair net for a crown Princess.”

Fans lost it at the newsreader's biceps. Picture: Twitter

However, fans couldn’t help but notice how buff he is.

“Joe, if a common AZ side effect is getting biceps like those you might be able to reverse vaccine hesitancy single-handedly,” wrote one Twitter user..

“How were you allowed into a hospital with those weapons?” said another.

A fourth user added, “BREAKINGNEWS: it can be confirmed that @JoeABCNews does indeed lift!”

“Joe using his AZ shot to show off biceps!”

Twitter had a similar reaction to Prince William when he had his jab.

Posting his vaccine photo in May, he wrote, “On Tuesday I received my first dose of the COVID-19 vaccine.

“To all those working on the vaccine rollout – thank you for everything you’ve done and continue to do.”

Fans are fawning over William's ripped arms. Picture: Instagram

Fans were incredibly vocal in the comments section.

“Guns,” wrote one user with the bicep emoji.

“He is really fit,” another commented.