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The spreading coronavirus has health officials from the U.S. to Europe searching for answers. To find them, they could look to the experience of Asia, which has been battling the deadly pathogen since January — with some success.

In a little over two months, the highly contagious disease has traveled from its epicenter in Wuhan, China, to at least 108 countries, sickened over 119,000 people and killed more than 4,200. Governments everywhere are struggling to curb outbreaks, locking down their borders and shutting down large parts of their economies.

Even before COVID-19, China, Hong Kong and some Southeast Asian nations had weathered the outbreak of SARS in 2003 and, more recently, the onset of MERS and swine fever, giving them experience in tackling the spread of infectious diseases, said Kenji Shibuya, a professor at King’s College London and former chief of health policy at the World Health Organization. “They have accumulated knowledge and practices, so there’s room for other countries to learn from these experiences.”

While it is too early to say the novel coronavirus is defeated in Asia — even with China claiming its epidemic has peaked — the Asian experience can be instructive for western nations now facing down the threat.

This is how they are doing it:

Testing

“No matter how your health systems or political systems are organized, the keys to epidemic control remain the same” — test, trace, isolate and inform, said Jessica Justman, a professor of medicine in epidemiology at Columbia University.

South Korea, which has the highest infection tally in Asia outside of China, is testing more than 10,000 people a day, the fastest pace globally. Researchers there began developing a virus test kit at the end of January — when South Korea had fewer than 10 infections — aided by a fast-track regulatory approval system that was set up after the MERS outbreak in 2015.

Efficient testing has allowed South Korea to isolate and treat infected people early, thereby slowing the virus’s spread and lowering the mortality rate to less than 1 percent.

On the other hand, Japan drew criticism for not testing enough people, which raises the prospect of scores of undetected infected people remaining unquarantined and spreading the virus more widely. There is rising concern that the U.S. is facing such a quandary as it emerges that the pathogen has been circulating for much longer than known in some states.

More testing, not less, is needed to investigate how the virus is spreading or if it starts adopting new transmission mediums, the World Heath Organization’s China representative, Gauden Galea, said in an interview on Monday.

Mass quarantine

China stunned the world when it put Hubei province, along with its capital city, Wuhan, in a lockdown in late January, effectively quarantining 60 million people in an unprecedented move aimed at curbing the outbreak.

Research has shown that the measure did slow the spread of the coronavirus overseas. The lockdown of Wuhan likely reduced overseas transmission of the virus by almost 80 percent, according to a paper published in the journal Science on March 6 by a team led by researchers at Northeastern University.

Italy went a step further than China this week, becoming the first country to attempt a nationwide lockdown. New York has ordered a containment around New Rochelle, where a cluster of infections originated.

The policy is not a cure-all and has been criticized for its social cost. In Hubei, the local medical system became overwhelmed and was unable to deliver basic care, causing widespread pain for residents.

“We shouldn’t romanticize the Chinese approach, given the economic and social damage it caused,” said Yanzhong Huang, director of global health studies at Seton Hall University in South Orange, New Jersey.

Social distancing

Social distancing — canceling mass events and closing down places where people gather — is often cited as one of the most effective measures of containing an outbreak by public health experts, with proven results that go as far back as the influenza pandemic of 1918.

Outside of China, Hong Kong took the most drastic measures early on by shutting down schools in late January. That order remains in place, and Japan followed suit a few weeks later. Governments as well as companies across the region also called off trade conferences to film festivals, with some sporting events canceled or held without spectators.

Preemptive, low-cost measures like social distancing and campaigns to encourage stricter hygiene can help rein in infection rates, according to a paper from Australian researchers last week.

Such efforts depend on the public buying in, which can come more easily in Asian countries with more authoritarian governments, or cultures where social harmony is emphasized.

“Social distancing is likely to be less top-down in the U.S.,” said Eran Bendavid, an infectious disease specialist at Stanford Medicine. “That puts a greater onus on individuals and communities.”

Big data

The novel coronavirus’s spread in developed Asian nations has allowed both governments and app developers to harness technology as part of the response. Transparent, timely public information also helps allay people’s fears and anxiety.

In Taiwan, a centralized response team integrated the national health insurance, immigration and customs databases, generating data to trace people’s travel history and clinical symptoms. It also used mobile phones to track people coming from high-risk areas, who were then quarantined.

Singapore has similar tracking measures, along with extensive contact tracing, and punitive measures for those who disobey mandated quarantines or lie about their travel history.

Developers in South Korea used government data and news reports to make websites and apps that allowed users to check if there were coronavirus cases in their vicinity. The Hong Kong Department of Health created a map dashboard that lets residents track cases and where they were discovered.

This, however, requires the digitalization of government records and health care data, and a wide use of smartphones, Shibuya at King’s College said. Data privacy may also be a more sensitive issue in Europe and the U.S. compared to some parts of Asia. China’s even-stricter surveillance of its citizens through the outbreak is raising ethical concerns.

Cover the cost

Potentially infected patients may be wary of seeking treatment, fearing the cost or missed days at work, which could scuttle disease mitigation efforts.

The best approach, experts say, is for governments or insurers to cover the testing costs. Such a measure has shown results: Thailand provided free testing and treatment of high-risk patients, which incentivized people to come forward. As of March 11, about 95 percent of over 4,800 patients under investigation had gone to a hospital voluntarily, according to the health ministry.

In Japan, the government had to issue several calls for companies to allow workers to take sick days instead of using vacation days. The U.S. is also grappling with similar issues around paid sick leave.

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