NSTworld: In other words, we know how many people have died from the virus, but not the true numbers infected. China wuhan coronoavirus
PARIS: How serious is the coronavirus outbreak? What are its symptoms and how contagious is it?Experts studying the new virus, still have key questions to answer before they can assess its danger. As of Sunday, over 1,600 cases have been confirmed in China, its country of origin, of which 54 have been fatal. Several cases have been detected in Asian countries, as well as a few in Australia, France, the United States and Canada. So far, no-one outside China has died. “It is hard to understand the mortality rate associated with this new virus currently, as we are only detecting severe cases in the initial stages of the epidemic, rather than the milder or asymptomatic cases,” Chinese scientist Lili Ren wrote in The Lancet. In other words, we know how many people have died from the virus, but not the true numbers infected. Travellers wear masks at Pearson airport arrivals, shortly after Toronto Public Health received notification of Canada's first presumptive confirmed case of coronavirus, in Toronto, Ontario, Canada. -Reuters 2019-nCoV, as it has been named, is part of the coronavirus virus family, the source of two previous fatal epidemics. The 2002/03 SARS outbreak (Severe Acute Respiratory Syndrome) started in Beijing and killed 774 people out of a total 8,096 infected. The 2012 MERS outbreak (Middle East respiratory syndrome) killed 858 people out of the 2,494 infected. So those outbreaks had significantly different mortality rates of 9.5 per cent and 34.5 per cent respectively. In general however, those hit by the new virus “are in a less serious condition than with SARS“, said Yazdan Yazdanpanah, head of infectious diseases at Paris Diderot University, on Saturday. “For the moment, the mortality rate is less than five per cent, he added. Chinese scientists reported in The Lancet Friday that, based on a study of 41 early-detected cases, some of the new virus’s symptoms resemble those of SARS. All patients had pneumonia, most had a fever, three-quarters of them were coughing and more than half had trouble breathing. In this picture taken on January 25, 2020, people wearing masks commute on a train on the first day of the Lunar New Year of the Rat in Hong Kong, as a preventative measure following a coronavirus outbreak which began in the Chinese city of Wuhan. -Reuters Despite this, lead author Bin Lao added: “there are some important differences“, such a no runny noses, sneezing or sore throats. Nor did the new virus cause stomach problems such as diarrhoea, which hit 20-25 per cent of SARS patients. The average age of the 41 patients studied was 49, most of them having visited Wuhan market, identified as the source of the outbreak. Nearly a third of them had serious breathing difficulties and six of them died. All this gives us a preliminary sketch of the new virus, even if one has to be cautious about drawing conclusions based on such a small sample. The study is all the more important because a current epidemic of flu, which has similar symptoms, has made isolating patients of the new virus difficult. It is still not clear how contagious it is. “The problem is that we still do not have enough data to accurately specify” the virus’s basic reproduction number – or level of infectiousness, says William Keevil of the University of Southampton in England. A firefighter truck drives to the emergency services of the Pellegrin university hospital (CHU) in Bordeaux, where a patient is hospitalised after being infected by a new SARS-like virus. -AFP But research still going through the peer review research process suggested that it might be “quite high” he added. “So if this is confirmed and the virus were to mutate in future to a more dangerous form, this would be concerning,” he said. The incubation rate for the new virus is thought to be a maximum of two weeks. Researchers think the new virus probably came from bats, as the SARS virus did, with which it shares 80 per cent of its genetic makeup. But we still don’t know which animal passed it on to humans. On Wednesday, a Chinese team suggested it could be a snake, but that was immediately challenged by other experts, who think a mammal is the more likely culprit. Identifying which animal it was could help fight the outbreak. Excavators and bulldozers are seen at the construction site where the new hospital is being built to treat patients of a new coronavirus, following the outbreak and the city's lockdown, on the outskirts of Wuhan, China. - Cnsphoto via Reuters With SARS, it turned out to be a civet, whose meat is very popular in China. Banning the consumption of civet and closing their breeding farms helped stop SARS from making a comeback, says Arnaud Fontanet of the Pasteur Institute in Paris. On the other hand, one reason it was harder to stem the MERS outbreak is because it came from dromedary camels, a widely used working animal. Health authorities and scientists say the same precautions against other viral illnesses can be used: wash your hands frequently, cover up your coughs, try not to touch your face. And anyone who does come down with the virus should be placed in isolation. People wear masks as they visit Wong Tai Sin temple on the first day of the Lunar New Year of the Rat in Hong Kong on January 25, 2020, as a preventative measure following a coronavirus outbreak which began in the Chinese city of Wuhan. -AFP “Considering that substantial numbers of patients with SARS and MERS were infected in health-care settings“, precautions need to be taken to prevent that happening again, the Chinese team warned in The Lancet. - AFP Related stories Read more: New Straits Times
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