Tech giants are struggling to control the spread of misinformation about the novel coronavirus — and in some cases, even profiting from it.

Key points: Misinformation about the coronavirus is spreading on social media

Misinformation about the coronavirus is spreading on social media On YouTube, ads for brands like KFC were being run next to conspiracy theories

On YouTube, ads for brands like KFC were being run next to conspiracy theories Experts say the situation is unsurprising, but better communication is needed

ABC Science found ads for brands including KFC and Elevit vitamins on YouTube videos that suggest the disease is a bioweapon targeting China, among other conspiracy theories. After being notified, Google removed the ads.

Social media companies and messaging platforms like Weibo and WhatsApp have long struggled with the spread of health misinformation, especially during disease outbreaks.

The coronavirus situation is evolving quickly, which means lies can outpace official sources as we search for answers and solutions — all abetted by technology platforms designed to send content, well, viral.

The spread of misinformation about the coronavirus is unsurprising, suggested Rod Lamberts, deputy director of the Australian National Centre for the Public Awareness of Science.

"If it's frightening, if it's sensational, if it's threatening, then we often follow similar patterns," Dr Lamberts said.

"People want to know what to do. People want to know if they should be worried, which is all very reasonable."

The spread of hoaxes is most troubling for those who need immediate help, including Chinese-Australians trying to leave Wuhan.

On Tuesday, the Australian Department of Foreign Affairs and Trade warned an online evacuation form circulating online was not an official document.

But most common so far is misinformation about the virus's presence in Australia as well as its origins and how to cure it.

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Rumour: The coronavirus has infected food in Australia

Earlier this week, a social media post warned that food originating in China such as fortune cookies and wagyu beef could be "contaminated" by the coronavirus.

It also claimed the "Bureau of Diseasology Parramatta", which does not exist, had found positive cases of the virus at Sydney train stations.

The post was quickly debunked by NSW Health, which said none of the areas mentioned posed a risk, however other iterations of the message were shared on WhatsApp.

Professor James McCaw, an infectious diseases epidemiologist at the University of Melbourne, said he had seen no evidence that consumption of food from China purchased in Australia would be problematic.

In Australia, much of the misinformation seen shared so far relates to the virus's potential impact locally, according to Rachel Blundy, editor of AFP Fact-Check in Hong Kong.

"In [Australia] specifically, it seems to be focusing on 'has the virus arrived in Australia, where should we avoid, how can we stay safe?" she said.

Information debunked by NSW Health continues to be shared on platforms like WhatsApp. ( ABC News: WhatsApp screenshot )

Rumour: Bill Gates created the coronavirus

One conspiracy theory being shared on Facebook and other sites suggests Bill Gates predicted the coronavirus several months ago, and was involved in "patenting" it.

A Facebook spokesperson said the Gates hoax had been rated as false by several third-party fact checkers.

"We are dramatically reducing its distribution and people who see it, try to share it, or already have, are alerted that it's false," she added.

In fact, there is not only one coronavirus — and confusion may arise because other strains have been patented as part of research.

The term refers to a large group of viruses that cause illnesses such as the common cold and gastrointestinal infections, and more recent diseases including SARS (severe acute respiratory syndrome) and MERS (Middle East respiratory syndrome).

They're named for the corona, or crown, of surface proteins that the virus uses to penetrate the cells of its host — in other words, the human who's been infected.

New virus strains emerge relatively frequently because the genetic structure of most viruses is so prone to mutating and changing.

Rumour: The coronavirus is a bio-weapon

Another conspiracy theory circulating on social media claims the coronavirus is a bioweapon.

On the video app TikTok, for example, one account suggested the Chinese Government started the coronavirus to decrease the country's population size.

The idea that diseases are deliberately created by governments or other bad actors is longstanding among conspiracy theorists — and challenging for fact checkers to debunk.

Kanishk Karan, a research assistant in the Atlantic Council's Digital Forensic Research Lab, said both medical misinformation and deliberate disinformation about the coronavirus were being spread online.

"The same was noted around Ebola virus disease," he said.

"Some conspiracy theorists weaponised the issue to make a belief that a secret plot is behind the origins of the virus."

On YouTube, ads for top brands had been shown on videos claiming coronavirus is a bioweapon, earning money for both the content maker and the video platform. But the ads have since been removed from these videos.

"We have strict policies that govern where we allow ads to appear," a YouTube spokesperson told the ABC.

"When we find content that is in violation of our policies, we take action."

TikTok was contacted for comment.

On YouTube, an ad for KFC was played before a conspiracy theory video about the origins of coronavirus. ( ABC News: YouTube screenshot )

Rumour: You can protect yourself by drinking bleach

On Facebook, a number of private groups focused on the disease have emerged in recent days.

While some users in these spaces are asking for advice about masks and protective measures, others are sharing erroneous theories about both the cause of coronavirus and potential solutions.

Posts on Weibo, Twitter and Facebook have suggested people rinse their mouths with salt water solution to prevent infection, which is not recommended, according to AFP Factcheck.

The Daily Beast also found promoters of the pro-Trump QAnon conspiracy theory dangerously advising fans to drink bleach in an attempt to ward off the illness.

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 1 minute 24 seconds 1 m 24 s What is this new coronavirus?

What can be done to stop misinformation

Some social media companies have taken steps to prevent the spread of bad information.

YouTube's policy is to try and surface authoritative sources in its "next watch" results. And Twitter now points local users that search "coronavirus" to the Australian Department of Health.

However, that information doesn't emerge if you search for "wuflu", for example — another way the disease is referred to online, Mr Karan noted on Twitter.

To avoid being misled, look for information from trusted media and government voices, and avoid information that appears be unsourced or inflammatory.

"People just need to keep checking for official sources," advised AFP's Ms Blundy, "and so if you're reading unofficial blogs and and unofficial Facebook pages, then you can't be sure that what you're reading is genuine."

We must also recognise that there are some questions about coronavirus that we don't yet know the answers to, Dr Lamberts said.

For that reason, social media companies, government and science communicators should share "simple, clear, straightforward messages" about the outbreak, he suggested.

"It affects these people ... You're at risk if ... These are the things you should do ... You don't have to worry if you're 'x'."