Experts believe that these behaviours could discourage people with symptoms from coming forward. Meanwhile, Hong Kong doctors went on strike amid the novel coronavirus outbreak to insist all borders with mainland China be shut completely.
As the deadly coronavirus has spread worldwide, it has carried with it xenophobia and Asian communities around the world are finding themselves subject to suspicion and fear.
When a patient on Australia's Gold Coast refused to shake the hand of her surgeon Rhea Liang, citing the virus that has killed hundreds, the medic's first response was shock.
But after tweeting about the incident and receiving a flood of responses, the respected doctor learned her experience was all too common.
There has been a spike in reports of anti-Chinese rhetoric directed at people of Asian origin, regardless of whether they have ever visited the centre of the epidemic or been in contact with the virus.
Chinese tourists have reportedly been spat at in the Italian city of Venice, a family in Turin was accused of carrying the disease, and mothers in Milan have used social media to call for children to be kept away from Chinese classmates.
In Canada, a white man was filmed telling a Chinese-Canadian woman "you dropped your coronavirus" in the parking lot of a local mall.
In Malaysia, a petition to "bar Chinese people from entering our beloved country" received almost 500,000 signatures in one week.
The incidents are part of what the Australasian College for Emergency Medicine has described as "misinformation" which says that it is fuelling "racial profiling" where "deeply distressing assumptions are being made about 'Chinese' or 'Asian-looking' people."
Disease has long been accompanied by suspicions of foreigners, from Irish immigrants being targeted in the Typhoid Mary panic of 1900s America to Nepali peacekeepers being accused of bringing cholera to earthquake-struck Haiti in the last decade.
"It's a common phenomenon," said Rob Grenfell, director of health and biosecurity for Australia's science and research agency CSIRO.
"With outbreaks and epidemics along human history, we've always tried to vilify certain subsets of the population," he said, comparing the behaviour to 1300s plague-ridden medieval Europe, where foreigners and religious groups were often blamed.
"Sure it emerged in China," he said of the coronavirus, "but that's no reason to actually vilify Chinese people."
In a commentary for the British Medical Journal, doctor Abraar Karan warned this behaviour could discourage people with symptoms from coming forward.
Claire Hooker, a health lecturer at the University of Sydney, said the responses from governments may have compounded prejudice.
The World Health Organization has warned against "measures that unnecessarily interfere with international travel and trade", but this has not stopped scores of countries from introducing travel bans.
The tiny Pacific nation of Micronesia has banned its citizens from visiting mainland China altogether.
"Travel bans respond largely to people's fears," said Hooker, and while sometimes warranted, they often "have the effect of cementing an association between Chinese people and scary viruses".
Abbey Shi, a Shanghai-born student in Sydney, said the attitude shown by some of her peers has "become almost an attack on students who are Chinese".
While Australia's conservative government has banished its citizens returning from Wuhan, the central Chinese city at the epicentre of the virus to a remote island for quarantine, thousands of students still stuck in China risk their studies being torpedoed.
"Right now it looks like they have to miss the semester's start and potentially the whole year because of the way the courses are set up," Shi said.
According to Hooker, studies in Toronto on the impact of Severe Acute Respiratory Syndrome, or SARS, an another global coronavirus outbreak in 2002 that showed the impact of xenophobic sentiment often lasted much longer than the public health scare.
"While there may be a cessation of direct forms of racism as news about the disease dies down, it takes quite a bit of time for economic recovery and people continue to feel unsafe," she said.
People may not rush back to Chinese businesses or restaurants and may even heed some of the more outlandish viral social media disinformation such as one popular post imploring people to avoid eating noodles for their own safety.
"In one sense, you might think the effects lasted from the last coronavirus to this one because the representation as China being a place where diseases come from has been persistent," Hooker said.
Hong Kong doctors strike to block out China
Hong Kong hospitals cut services as medical workers were striking for a second day on Tuesday to demand the border with mainland China be shut completely to ward off a virus that caused its first death in the semi-autonomous territory.
All but two of Hong Kong's land and sea crossings with the mainland were closed at midnight after more than 2,000 hospital workers went on strike on Monday.
As many as 9,000 medical workers could join the bigger walkout on Tuesday to demand closure of the border across which tens of thousands of people continue to travel daily.
Hong Kong 's Hospital Authority said it was cutting back services because "a large number of staff members are absent from duty" and "emergency services in public hospitals have been affected".
Also Tuesday, the leader of the nearby gambling enclave of Macao asked the city's casino bosses to suspend operations to prevent further infections after a worker at one of resorts tested positive for the virus.
Macao has recorded 10 cases in all.