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How Many Coronavirus Circumstances in China?

Officers Tweak the Reply

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HONG KONG — The information was abrupt and, to some, stunning: In a single day, Heilongjiang, a Chinese language province close to Russia, had minimize its depend of confirmed coronavirus instances by greater than a dozen.

The revision stemmed from what seemed to be a bureaucratic resolution, buried in a sequence of dense paperwork from the nationwide authorities. Well being officers mentioned that they might reclassify sufferers who had examined optimistic for the brand new coronavirus however didn’t have signs, and take them out of the full depend of confirmed instances.

The paperwork supplied little element or clarification, and skepticism was quick. A Hong Kong newspaper referred to as the choice a “disguise.” World Well being Group officers appeared caught off guard when requested concerning the transfer at a information convention this week.

The change in counting instances is just one issue that has made it tough for consultants to find out the true scale of the epidemic. The tally up to now is that the coronavirus has killed not less than 1,100 individuals and sickened greater than 44,000, however consultants say definitive numbers are elusive.

Within the days for the reason that modifications emerged, a number of virus consultants world wide have mentioned that the reclassification was a minor change, even a typical transfer throughout new outbreaks. Different consultants questioned the revision.

The cautious response in some quarters underscores that distrust of the Chinese language authorities stays pervasive.

“It’s fairly clear that there’s a difficulty with belief about regardless of the Chinese language authorities comes out with in the intervening time,” mentioned Kerry Brown, a former diplomat and director of the Lau China Institute at King’s School, London.

“Which may be terribly unfair,” Mr. Brown mentioned. However, he added, “to redefine issues — even legitimately — at a second like that is all the time going to be a presentational problem, as a result of individuals are going to be very delicate, they usually’re going to suspect there’s one other agenda.”

Heilongjiang’s officers weren’t the one ones to shift their tallies of confirmed instances. Hangzhou, a metropolis in japanese China, diminished its depend by 12 on Sunday as a result of the patients did not live there. Hubei, the province at the heart of the outbreak, recently reduced its confirmed case number by 87 with little explanation.

  • Updated Feb. 10, 2020

    • What is a Coronavirus?
      It is a novel virus named for the crown-like spikes that protrude from its surface. The coronavirus can infect both animals and people, and can cause a range of respiratory illnesses from the common cold to more dangerous conditions like Severe Acute Respiratory Syndrome, or SARS.
    • How contagious is the virus?
      According to preliminary research, it seems moderately infectious, similar to SARS, and is possibly transmitted through the air. Scientists have estimated that each infected person could spread it to somewhere between 1.5 and 3.5 people without effective containment measures.
    • How worried should I be?
      While the virus is a serious public health concern, the risk to most people outside China remains very low, and seasonal flu is a more immediate threat.
    • Who is working to contain the virus?
      World Health Organization officials have praised China’s aggressive response to the virus by closing transportation, schools and markets. This week, a team of experts from the W.H.O. arrived in Beijing to offer assistance.
    • What if I’m traveling?
      The United States and Australia are temporarily denying entry to noncitizens who recently traveled to China and several airlines have canceled flights.
    • How do I keep myself and others safe?
      Washing your hands frequently is the most important thing you can do, along with staying at home when you’re sick.

In all, China’s National Health Commission has retroactively subtracted at least 118 cases.

But the change in how cases are classified could mean even steeper changes in the totals going forward.

The shifting case counts are not the only example of conflicting or spotty information. Researchers have given differing estimates on when the outbreak might peak, ranging from a date already past to several months in the future. The Chinese authorities have closely guarded the demographic details about the fatalities, creating uncertainty about who is most susceptible.

Scientists have even debated just how much of a danger asymptomatic transmission poses. Chinese health officials were among the first to raise the prospect of asymptomatic transmission, even as health experts in other countries were skeptical of early reports that the virus could be passed on by such patients. But in recent days, Chinese officials have also played down the asymptomatic transmission risk.

The uneven information comes as China’s leader, Xi Jinping, said that the containment efforts were working. “After hard work, the epidemic situation has seen positive change, and the prevention and control work has achieved positive results,” he said during a meeting of the Communist Party leadership in Beijing on Wednesday, according to a summary of his remarks by state-run media. “This is hard-won, and all parties have contributed.”

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China’s reported count of new infections on Tuesday was its lowest in a single day since Jan. 30. But experts cautioned that it is premature to draw any conclusions from the figure.

The changes to the classification of asymptomatic coronavirus cases emerged on Jan. 29, in a set of guidance from China’s National Health Commission. The agency said that it would no longer count patients who had tested positive for the coronavirus but did not display symptoms as “confirmed cases.” Instead, those patients would be counted separately, as “positive diagnosis” patients, and would become confirmed only if they began showing symptoms.

Chinese health officials have given little public justification for the labeling change. The National Health Commission did not immediately return a request for comment. Reached by phone, Wu Zunyou, the chief epidemiologist of the Chinese Center for Disease Control and Prevention, directed inquiries to the health commission’s news office.

The changes prompted debate among some public health experts.

“Adapting definitions during an outbreak is not unusual, with increasing insights and also with prioritizing where efforts need to go,” said Dr. Marion Koopmans, the head of the viroscience department at Erasmus University Medical Center in the Netherlands. By shifting emphasis away from asymptomatic cases, officials can concentrate resources on more serious cases, she said.

Dr. Benjamin Cowling, who leads the division of epidemiology and biostatistics at the University of Hong Kong, said the number of cases affected by the change in terminology would most likely be low.

He added that attempts to count individual infections become less reliable anyway as outbreaks increase in size.

Still, even experts who said that the effect of discounting certain cases would be small said that it would be useful to epidemiologists — and the public — to have a complete count of all cases, including asymptomatic ones.

Dr. Malik Peiris, the chair of virology at the University of Hong Kong, said in an email that mild or asymptomatic infections could form an “invisible iceberg” that made a given virus’s fatality rate much lower than it initially appeared.

Determining the true denominator of the number of people infected — whether symptomatic or not — would, he said, “be most informative to, hopefully, calm current panic in China and the world.”

In a sign of just how much the change could further muddle public understanding of the virus, even the W.H.O., which has praised the Chinese government for its cooperation in fighting the outbreak, expressed confusion.

“We’re not aware of that change. Certainly not a change that would discount lab-confirmed cases,” Dr. Michael Ryan, who leads the W.H.O.’s health emergencies program, said when asked this week about the labeling change. “That sounds strange.”

Dr. Chen Bingzhong, a former senior government health official in Beijing who has been vocal in calling for more transparency about public health crises, said a full tally of the number of cases would keep the authorities accountable.

“Add a confirmed case, and the leaders’ responsibilities increase,” Dr. Chen said.

He added that a positive test result should be disclosed as such, regardless of symptoms.

“Testing positive means it is the new coronavirus,” he said. “If you don’t recognize it, you are covering the truth.”

Jin Wu contributed reporting from Hong Kong, and Yiwei Wang contributed research from Beijing.

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