The reality star shared a photo of herself in scrubs with a surgical mask and plastic gloves, she wrote, "Stop being idiots. I get that the fact you can’t see it gives you a sense of confidence and comfort. But it’s real."
She added it was only a few months ago that Australia banded together following the "horrific bush fires", she said, "We did that by coming together, supporting each other, loving each other. Now we need to come together by staying away."
"Right now, your health care workers are working overtime for you. Putting themselves at risk for you. Getting no sleep for you. Going home crying for you. Coming out of retirement for you.
"After a huge day yesterday and seeing it first hand I felt the overwhelming need to mention it. Seeing patients abuse Drs, nurses, radiographers, receptionists and other staff for the waiting time and the ‘treatment’ they are getting is disgraceful.
"Yelling at healthcare workers because they are caught getting a drink of water (can guarantee it’s probably the first break they’ve taken in 12 hours) is disgraceful."
Brittany went on to say, "They are turning up every day and every night to take care of YOU. So you should be taking care of THEM. Please realise that they are doing their best for you. Why would they want anything other than the best for you?"
She said there were doctors who were being forced to see patients without the right protective gear because there's a shortage and "people are stealing it and over buying it when they don’t need it".
"We need to be kept safe so that we can keep YOU safe. It’s simple."
Brittany told her followers to "stop stealing and hoarding sanitiser, groceries and protective equipment", she added that people need to stop going out in groups, thus putting more people at risk and then pressure on the healthcare system.
Brittany's warning comes as all non-essential services will be shut down from Monday as cases of coronavirus rise rapidly in Australia.
Pubs, clubs, gyms, cinemas and places of worship will be closed with restaurants and cafes forced to switch to takeaway only.
New South Wales is the worst affected state with over 500 confirmed cases, while Victoria and Queensland have almost 300 each.
Supermarkets, petrol stations, pharmacies and home delivery services will continue to run.
Seven people have died from coronavirus in Australia.
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