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[David Fickling] Small weapons are the most potent in virus fight

How do you turn a disease outbreak into an epidemic? The best way might be to mix infected people with the healthy for long periods in crowded conditions, and then move them around to new locations.

That’s worrying, because that more or less describes the situation of many people at the center of China’s coronavirus outbreak.

Yang Zhongyi, a 53-year-old woman in Wuhan with feverish symptoms, has been unable to get full-time admission to hospitals or testing in the city for two weeks but has been put on drips in unquarantined areas in four separate hospitals in the city, according to a Reuters report this week. It said she spends her days queuing for treatment.

Other reports of patients with suspicious conditions being bounced between health care facilities without admission and videos of overcrowded waiting areas paint a similar picture.

Hospitals are meant to be places where diseases are cured -- but they can also be where they are most effectively propagated. That’s particularly the case with coronaviruses: The 2015 outbreak of Middle East respiratory syndrome in South Korea took place almost entirely within health care settings, with just a handful of transmissions outside of hospitals. About a fifth of people who caught severe acute respiratory syndrome worldwide were health care workers. That share rises further if you include patients who were infected in hospitals and clinics.

At present, Wuhan’s hospitals show many signs of being overwhelmed. All the 14 patients in an infectious disease ward at Wuhan Union Hospital were health care workers at the hospital itself, state-owned CGTN said in a recent video segment.

Halting the spread of disease depends crucially on the quality of disease prevention in hospitals, and there the evidence is decidedly mixed.

“The Chinese health care system is riddled with long wait lists, shortages, and poor equipment because of funding constraints,” Bingwei Sun of Jiangsu University wrote in a 2016 article in the American Journal of Infection Control. “Hospital wards have become breeding grounds for microbial pathogens, with increased risk of infection.”

Hand-washing with water and alcohol, air filtration to clean out airborne infections, and provision of triage centers to separate healthy from unhealthy people is critical to minimizing risks, according to professor Anjali Joseph, a specialist in health care design at Clemson University School of Architecture in South Carolina.

“There should be emergency procedures in place to identify and isolate any potential cases so they don’t mix with healthy people,” she wrote by email. “It is critical to contain this in the early stages.”

There are some positive signs. Meeting guidelines on hand-washing is generally pretty good in Hubei province, according to a 2017 study, with compliance rates of between 67 percent in public hospitals and 79 percent in private facilities. That’s well below 100 percent, but an improvement on levels of around 48 percent found in a 2015 study of eight US hospitals and the 24 percent found in an earlier study of one Hubei hospital. In videos circulating on social media, health care workers in public areas appear to all be wearing gowns and gloves to protect themselves, too.

Isolation and ventilation may be more of an issue, since it can’t be solved just by distributing hand sanitizers and gowns. In China, “most hospital wards have poor air quality and weak ventilation,” according to a 2016 study by Wenlong He, an academic at Tianjin Medical University.

Some 2,300 of the extra beds planned for Wuhan will be in two hospitals being built in the space of a fortnight on the outskirts of the city, modeled on the Xiaotangshan facility put up in Beijing during the 2003 SARS outbreak.

It’s possible that those structures will help. Designing a facility from scratch makes it easier to implement useful hygiene measures that don’t exist in normal hospitals, such as the segregated wings for staff and patients separated by disinfection areas that were built at Xiaotangshan.

Still, it’s well-known in the construction industry that you can only finish major projects on tight deadlines if you cut corners -- and it’s in those corners that the greatest risks of contamination lurk.

For all Xiaotangshan’s apparent success, SARS was already well into its normal seasonal decline by the time it was opened in early May of 2003. Each infection was producing an average of 0.5 new cases at that point, meaning the epidemic was dying out of its own accord, according to a 2008 study.

Wuhan’s new hospitals will be fighting this outbreak at its most intense. That’s a whole lot more challenging. Completing such a large project so quickly is an impressive feat of construction -- but it’s in the small details of hygiene that this fight will be won.

David Fickling
David Fickling is a Bloomberg Opinion columnist covering commodities, as well as industrial and consumer companies. -- Ed.