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Saliva could help you test for COVID-19 from home

Elizabeth Gracie
Researchers from the University of Queensland say that saliva could allow for more efficient and less invasive testing for the novel coronavirus. 

Over 1.2m Australians have already been tested for COVID-19 through the use of both a throat and nose swab.  

According to Dr. Pingping Han, a Post Doctoral Research Fellow at the University of Queensland’s (UQ) School of Dentistry, saliva could be used to not only diagnose someone infected with COVID-19 but could help researchers monitor individual immunity to the novel virus. 

“Ironically saliva is a leading way that disease is transmitted, via droplets on surfaces and in the air,” said Dr. Han.

“But it can also be incredibly useful for diagnosing the virus and monitoring a person’s health”.

Dr. Han says that using saliva to diagnose for symptomatic and asymptomatic patients is ideal for responding to a pandemic such as COVID-19. 

“Saliva testing allows quick, accurate and noninvasive detection in patients, as well as the determination of a patient’s immune status” said Dr. Han. 

Salivary testing is also ideal for effective, large scale pandemic control measures to prevent COVID-19’s spread according to Dr. Han. 

“An ideal saliva test would be a disposable, off the shelf device that could be used at home by individuals without exposing them or others to the risk of visiting a clinic.

“Already in Hong Kong, Shenzen, and Italy, the use of salivary diagnostics found SARS-CoV-2 present in the saliva of COVID-19 patients.

“This suggests saliva is a potentially very useful source of specimens for detecting the virus.”

The United States Food and Drug Administration has already approved the first at-home saliva test for SARS-CoV-2 which sees participants collecting their own saliva before sending it off to a lab for results. 

Dr. Han hopes that Australia will soon follow suit and that her review into the use of saliva as a viable testing method would significantly reduce transmission levels of the virus, as well as minimizing the risks to both healthcare professionals and vulnerable individuals. 

However without solid research evidence to support this method of testing, the government will not adopt it for COVID-19.

As a result of this, Dr. Han says that further research on salivary testing is urgently required. 

“Further studies into microbial pathogens such as bacteria and viruses and immunological antibodies are urgently required, to help validate saliva for future routine specimen collections, in this and future pandemics” Dr. Han said. 

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