Hilary Duff's surprise Covid Delta diagnosis despite being vaccinated

Hilary Duff has been diagnosed with the Covid-19 Delta variant, despite being fully vaccinated.

The Lizzie Maguire star revealed that she'd caught the virus on her Instagram Stories on Saturday afternoon, just days after filming began on her upcoming TV series.

Hilary Duff has Covid

Hilary, 33, shared a close-up selfie from bed with the caption: "That delta...she's a little b*tch".

She went on to list her symptoms as, "Bad headache. No taste or smell. Sinus pressure. Brain fog."

"Happy to be vaxxed," she added along with a peace sign emoji.

Hilary celebrated receiving the Pfizer vaccine back in April, just weeks after welcoming her third child, daughter Mae.

Earlier this week, the former Disney star posted an Instagram snap of herself with her castmates on set of the How I Met Your Mother sequel, How I Met Your Father.

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"Who’s ready for us??? We may or may not have been sitting in front of a certain someones apartment," Hilary captioned the pic.

It's unknown when or how Hilary contracted Covid, nor whether her co-stars have been affected. The Hollywood Reporter reports that Hulu, the streaming service behind the How I Met Your Father series, 'declined comment'.

Her diagnosis is being called a 'breakthrough case' of the virus because it occurred after she was vaccinated.

It's important to note that no vaccine is 100 percent effective and that breakthrough cases, while rare, are to be expected.

There is strong evidence to suggest that people who are vaccinated and subsequently contract Covid are much less likely to be hospitalised or die than people who are not vaccinated.

Melissa Joan Hart, star of the '90s hit TV series, Sabrina, has also shared on Instagram that she has Covid despite being vaccinated.

"I am vaccinated and I got Covid and it's bad," the 45-year-old explained in a video filmed from her bed.

"It's weighing on my chest. It's hard to breathe. One of my kids, I think, has it so far. I'm praying that the other ones are okay," she added.

Melissa shares three sons with her husband, Mark Wilkerson, and suspects that one of her boys may have brought the virus home from school where masks are not mandatory.

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