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US News How the Coronavirus Numbers Changed So Sharply

07:30  14 february  2020
07:30  14 february  2020 Source:   msn.com

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The number of cases and deaths in the coronavirus epidemic in China jumped sharply on Thursday as the authorities there changed how they keep track of the disease, and not, primarily, because of any change in the shape of the outbreak. There is still a lot of uncertainty about the true numbers — as

Live statistics and coronavirus news tracking the number of confirmed cases, recovered patients, tests, and death toll due to the COVID-19 coronavirus from Wuhan, China. Coronavirus counter with new cases, deaths, and number of tests per 1 Million population. Historical data and info.

(Video by Reuters)

The number of cases and deaths in the coronavirus epidemic in China jumped sharply on Thursday as the authorities there changed how they keep track of the disease, and not, primarily, because of any change in the shape of the outbreak.

There is still a lot of uncertainty about the true numbers — as with any new disease — and that will continue for the foreseeable future. Underscoring that point, hours after China revised its figures, the World Health Organization put out a lower set, saying that for now, it would not change the way it counts.

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The numbers surrounding the coronavirus epidemic are preliminary, and a mathematician explains why. Caveat: Those numbers are based on the best available data, and the best available data is still very incomplete. The prediction also includes assumptions such as how many unreported cases

When China reported a drop in the number of new cases of the deadly coronavirus earlier this week, hopes were raised that the outbreak might be slowing down.

But experts say there were good reasons for changing the way patients with the disease, newly named Covid-19, were counted, and the new approach should catch many cases that had been missed before. That will allow more patients to get treatment and be quarantined faster.

Here is a look at what we know — and what we don’t — about the new coronavirus numbers and what they say about the scope of the crisis.

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a person walking down a street next to tall buildings: A nearly empty commercial area in Wuhan on Thursday. © Getty Images A nearly empty commercial area in Wuhan on Thursday. How did the numbers change?

For several days, the Chinese government had reported figures that suggested the spread of the disease was slowing, but that changed abruptly on Thursday.

Officials in Hubei, the Chinese province that is the epicenter of the outbreak, said there had been more than 48,000 cases there, a 44 percent jump from the day before. They also reported 1,310 deaths, a 23 percent increase. The trend continued on Friday, though not as markedly, when Hubei officials disclosed another 4,800 cases and 116 more deaths.

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What is the coronavirus and how worried should we be? The number of those affected internationally has surpassed 1,400, but the death toll remains at 41. According to Tom Cheshire, Sky News Asia correspondent, the number has increased from 40 cases of infection 10 days ago.

Maybe our numbers aren’t entirely giving the full picture of the coronavirus , China health officials said on Tuesday. So if China’s numbers rise fast in the days ahead, that’s probably the reason. Investors will be spooked, regardless. Officials said the new measures would help to address growing public

Previously, cases were counted only if patients tested positive for the new virus. Now, the figures appear to include anyone who has a CT scan of the lungs showing a telltale pattern of pneumonia.

In the short run, the new accounting may deepen confusion about the true size of the epidemic. It also complicates efforts to track the growth of the disease over the last several weeks.

“We need to be careful in interpreting these numbers,” Dr. Michael Ryan, the World Health Organization’s emergency responses chief, said on Thursday. The larger number of cases, he said, “does not represent a significant change in the trajectory of the outbreak.”

An elderly man wearing a face mask has his temperature checked before entering a community hospital in Shanghai on February 13, 2020. An elderly man wearing a face mask has his temperature checked before entering a community hospital in Shanghai on February 13, 2020. The W.H.O. then released its own figures, leaving out the diagnoses made without a positive test for the virus — and indicating that it did not fully understand the change China had made.

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Here’s a by-the- numbers look at the outbreak — including how rapidly the coronavirus spreading and just how deadly it really is. Officials have identified a growing number of infected people in Washington. As of March 2, at least 18 patients had tested positive for the virus — six had died

How quickly did the coronavirus spread across the globe? That's a dramatic change from the situation six weeks ago. On March 8, South Korea's total number of tests done per million How did the coronavirus first infect humans? A man holding a pangolin at a wild-animal rescue center in Cuc

“For consistency, we report here only the number of laboratory-confirmed cases,” the organization said in a situation report. “W.H.O. has formally requested additional information on the clinically diagnosed cases, in particular when these have occurred in the course of the outbreak and whether suspect cases were reclassified as clinically diagnosed cases.”

The W.H.O. reported almost 47,000 confirmed cases worldwide, fewer than 1 percent outside mainland China. The Chinese figures put the total at more than 61,000 cases.

What was wrong with the old way of counting?

In a word, plenty.

Kits to test for the virus are not being produced quickly enough to keep up with demand, and they take days to produce results. Using CT scans means more patients can be checked, with the results available almost immediately.

And the tests for the virus have not been very reliable. Many sick people have tested negative, only to test positive later. That appears to be, at least in part, because standard testing involves swabbing nasal passages and the throat, while the virus may be lodged in the lungs.

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Case numbers remain persistently high across much of the country as reports of new infections surge in The numbers in this article are being updated several times a day based on the latest information our journalists The coronavirus has left no state unscathed. But its impact has been wildly uneven.

Coronavirus disease 2019 (COVID-19) is an infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).

In the United States, the Centers for Disease Control and Prevention shipped hundreds of testing kits to state laboratories — and days later revealed that some of them were faulty. It is not clear whether China has experienced similar problems in making the tests.

Gallery: Coronavirus outbreak (Photo Services)

So are the new numbers definitive?

No.

There are several ways cases might still be missed. Some people get sick, and die or recover, without ever seeing a doctor. CT scans allow doctors to identify people whose infections have caused pneumonia, which can be fatal, but the scans will not catch people with milder symptoms.

There is another source of confusion about the numbers. It was reported this week that China is no longer counting as confirmed cases people who test positive for the virus yet show no symptoms. But some experts said they were not sure what had actually changed.

The Chinese health authorities say they can distinguish, on a CT scan, pneumonia brought on by the coronavirus from some other serious lung diseases. But it is not clear that they can tell it from pneumonia caused by other diseases, like seasonal influenza; the accuracy may vary with the skill of the doctor reading the scan.

Will we eventually get more accurate figures?

Quite possibly.

Right now, labs are testing for the virus itself, and viruses can be hard to detect. What is often easier to identify is the immune system's own response.

When a patient contracts an infection, the body produces antibodies to it — proteins in the blood that recognize a particular pathogen and trigger an immune system attack on it. Labs around the world are working to develop a test for antibodies to the new coronavirus, but none is available yet.

It could be tricky.

There are several strains of coronavirus in humans, including ones that cause common colds, SARS and MERS. Antibodies to the new virus may be hard to distinguish from the antibodies people already have to other coronaviruses.

In any case, it can take days or weeks before a patient tests positive for antibodies to a new infection, so the test may not be useful in diagnosing current illnesses.

So while an effective antibody test may produce a fairly comprehensive picture of an outbreak, that picture will lag a bit behind the reality.

‘We’re in a Petri Dish’: How a Coronavirus Ravaged a Cruise Ship .
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