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1.A new coronavirus, a cousin of the SARS virus, has infected more than 10000 people since the outbreak began in Wuhan, China, in December.Scientist Leo Poon, who first decoded the virus, thinks it likely started in an animal and spread to humans.
2. "What we know is that it causes pneumonia （肺炎）and then doesn't respond to antibiotic（抗生素） treatment, which is not surprising, but then in terms of mortality （死亡率）, SARS kills 10% of the individuals,"Poon, a virologist（病毒学家）at the School of Public Health at The University of Hong Kong, said.
3.The World Health Organization offered guidance to countries on how they can prepare for it, including how to monitor for the sick and how to treat patients.
4.Here are seven things you should know about a coronavirus.
5.Coronaviruses are a large group of viruses that are common among animals. In rare cases, they are what scientists call zoonotic（人畜共患病）, meaning they can be transmitted from animals to humans, according to the US Centers for Disease Control and Prevention.
6.The viruses can make people sick, usually with a mild to moderate upper respiratory tract illness（上呼吸道疾病）, similar to a common cold. Coronavirus symptoms include a runny nose, cough, sore throat, possibly a headache and maybe a fever, which can last for a couple of days.
7.For those with a weakened immune system,the elderly and the very young, there's a chance the virus could cause a lower, and much more serious, respiratory tract illness like a pneumonia orbronchitis [brɒŋˈkaɪtɪs]（支气管炎）.
8.There are a handful of human coronaviruses that are known to be deadly.
9.Middle East Respiratory Syndrome（中东呼吸综合征）, also known as the MERS virus, was first reported in the Middle East in 2012 and also causes respiratory problems, but those symptoms are much more severe. Three to four out of every 10 patients infected with MERS died, according to the CDC.
10.Severe Acute Respiratory Syndrome（严重急性呼吸综合征）, also known as SARS, is the other coronavirus that can cause more severe symptoms. First identified in the Guangdong province in southern China, according to the WHO, it causes respiratory problems but can also cause diarrhea [ˌdaɪəˈriə]（腹泻）, fatigue （疲劳）,shortness of breath, respiratory distress （呼吸窘迫） and kidney failure （肾衰）.Depending on the patient's age, the death rate with SARS ranged from0-50% of the cases, with older people being the most vulnerable（易受伤害的）.
When it comes to human-to-human transmission of the viruses, often it happens when someone comes into contact with the infected person's secretions（分泌物）. Depending on how virulent（有毒的）the virus is, a cough, sneeze or handshake could cause exposure. The virus can also be transmitted by touching something an infected person has touched and then touching your mouth,nose or eyes. Caregivers (护理人员) can sometimes be exposed by handling a patient's waste, according to the CDC.
1. Which of the following can explain the underlined word in paragraph 1 ?
1.A new coronavirus, a cousin of the SARS virus, has infected more than 10000 people since the outbreak began in Wuhan, China, in December.Scientist Leo Poon, who first decoded the virus, thinks it likely started in an animal and spread to humans.
2. "What we know is that it causes pneumonia （肺炎）and then doesn't respond to antibiotic（抗生素） treatment, which is not surprising, but then in terms of mortality （死亡率）, SARS kills 10% of the individuals,"Poon, a virologist（病毒学家）at the School of Public Health at The University of Hong Kong, said.
3.The World Health Organization offered guidance to countries on how they can prepare for it, including how to monitor for the sick and how to treat patients.
4.Here are seven things you should know about a coronavirus.
5.Coronaviruses are a large group of viruses that are common among animals. In rare cases, they are what scientists call zoonotic（人畜共患病）, meaning they can be transmitted from animals to humans, according to the US Centers for Disease Control and Prevention.
6.The viruses can make people sick, usually with a mild to moderate upper respiratory tract illness（上呼吸道疾病）, similar to a common cold. Coronavirus symptoms include a runny nose, cough, sore throat, possibly a headache and maybe a fever, which can last for a couple of days.
7.For those with a weakened immune system,the elderly and the very young, there's a chance the virus could cause a lower, and much more serious, respiratory tract illness like a pneumonia orbronchitis [brɒŋˈkaɪtɪs]（支气管炎）.
8.There are a handful of human coronaviruses that are known to be deadly.
9.Middle East Respiratory Syndrome（中东呼吸综合征）, also known as the MERS virus, was first reported in the Middle East in 2012 and also causes respiratory problems, but those symptoms are much more severe. Three to four out of every 10 patients infected with MERS died, according to the CDC.
10.Severe Acute Respiratory Syndrome（严重急性呼吸综合征）, also known as SARS, is the other coronavirus that can cause more severe symptoms. First identified in the Guangdong province in southern China, according to the WHO, it causes respiratory problems but can also cause diarrhea [ˌdaɪəˈriə]（腹泻）, fatigue （疲劳）,shortness of breath, respiratory distress （呼吸窘迫） and kidney failure （肾衰）.Depending on the patient's age, the death rate with SARS ranged from0-50% of the cases, with older people being the most vulnerable（易受伤害的）.
When it comes to human-to-human transmission of the viruses, often it happens when someone comes into contact with the infected person's secretions（分泌物）. Depending on how virulent（有毒的）the virus is, a cough, sneeze or handshake could cause exposure. The virus can also be transmitted by touching something an infected person has touched and then touching your mouth,nose or eyes. Caregivers (护理人员) can sometimes be exposed by handling a patient's waste, according to the CDC.
1. Which of the following can explain the underlined word in paragraph 1 ?
举一反三
- l What is coronavirus? This is a very large outbreak. This is Dr. Bill Schaffner, I’m an [1] isease specialist and public health person. Coronaviruses are a whole family of viruses. For the most part, they don’t cause any real clinical illness except the [2] . But you know, from time to time, there’s a rogue coronavirus that develops. We remember SARS 2002, 2003. And then there was another, the MERS virus, the Middle East Respiratory Syndrome virus. This new virus, like those other rogue viruses, probably was first [3] to humans from animals.
- The ____1____（novelty）coronavirus(冠状病毒) has much in common ____2___ seasonal flu.They are both viral infections, share similar symptoms and crucially(关键地） can spread from human to human. In the midst of flu season in much of the northern hemisphere, ____3___(tell) the difference between the two will be vital in stopping its spread. Human coronaviruses, of which there are four, can cause respiratory (呼吸道)infections similar to flu: while many symptoms are mild, both can lead to pneumonia（肺炎） and become lethal（致命的）. ___4___, the novel coronavirus is more serious than __5__ "typical influenza infection,(流感)"says Ian Jones, a professor of virology at the University of Reading. "This virus appears to go___6___(far) down into the lungs than would generally be the case. Therefore, it will give you___7___ (symptom) of pneumonia(肺炎): the lungs becoming flooded, they don't function very well and the patient gets into breathing difficulty." While the mortality rates and symptoms of flu and novel coronavirus may end up being similar, humans' ability ___8____(fight) off the viruses differs greatly. Humans have naturally built up antibodies to seasonal flu and annual vaccines____9____(develop) to fight it. During a pandemic (流行病), which the new coronavirus has the potential to become, "there is no immunity (免疫性) in the population so you have potential for a ___10___(globe) spread," warns Jones.
- MERS coronavirus is Middle East Respiratory Syndrome coronavirus.
- Complete the following passage using words from the list A-L in the box below. A. sore B. severe C. connect D. infect E. pandemic F. epidemics G. commonly H. Unfortunately I. initially J. expected K. suspected L. runny Influenza, (1) called "the flu," is an illness caused by RNA viruses (Orthomyxoviridae family) that (2) the respiratory tract of many animals, birds, and humans. In most people, the infection results in the person getting a fever, cough, headache, and malaise (tired, no energy); some people also may develop a (3) throat, nausea, vomiting, and diarrhea. The majority of individuals has flu symptoms for about 1-2 weeks and then recovers with no problems. However, compared with most other viral respiratory infections, such as the common cold, influenza (flu) infection can cause a more (4) illness with a mortality rate (death rate) of about 0.1% of people infected with the virus. The above is the usual situation for the yearly occurring "conventional" or "seasonal" flu strains. However, there are situations in which some flu outbreaks are severe. These severe outbreaks occur when a portion of the human population is exposed to a flu strain against which the population has little or no immunity because the virus has become altered in a significant way. These outbreaks are usually termed (5) . Unusually severe worldwide outbreaks (pandemics) have occurred several times in the last hundred years since influenza virus was identified in 1933. By an examination of preserved tissue, the worst influenza (6) (also termed the Spanish flu or Spanish influenza) occurred in 1918 when the virus caused between 40-100 million deaths worldwide, with a mortality rate estimated to range from 2%-20%. In April 2009, a new influenza strain against which the world population has little or no immunity was isolated from humans in Mexico. It quickly spread throughout the world so fast that the WHO declared this new flu strain (first termed novel H1N1 influenza A swine flu, often later shortened to H1N1 or swine flu) as the cause of a pandemic on June 11, 2009. This was the first declared flu pandemic in 41 years. Fortunately, there was a worldwide response that included vaccine production, good hygiene practices (especially hand washing), and the virus (H1N1) caused far less morbidity and mortality than was (7) and predicted. The WHO declared the pandemic's end on Aug. 10, 2010, because it no longer fit into the WHO's criteria for a pandemic. Researchers identified a new influenza-related viral strain, H3N2, in 2011, but this strain has caused only about 330 infections with one death in the U.S. Since 2003, researchers identified another strain, H5N1, a bird flu virus, that caused about 650 human infections. This virus has not been detected in the U.S. and easily spreads among people in contrast to other flu strains. (8) , people infected with H5N1 have a high death rate (about 60% of infected people die). Currently, H5N1 does not readily transfer from person to person like other flu viruses.
- The flu is a highly (1) respiratory illness. It turns up year after year with devastating consequences, all caused by a most elusive virus. The influenza, or flu virus, is a recurring nightmare. It causes more than 36,000 deaths in the U.S each year, and was responsible for some of history’s deadliest pandemics. Like other viruses, the flu virus is a parasite. The viral agent itself called, a virion, is made of ribonucleic acid or RNA surrounded by proteins. The flu virus uses two proteins to attack its host, hemagglutinin and neuraminidase or the HA and NA proteins. The HA protein attaches a virus to a cell and lets it in. Once the virus is inside, it multiplies. Then the NA protein cuts this (2) swarm loose, sending it off to infect more cells. This triggers the immune system to bombard the swarm and to destroy infected tissue throughout the respiratory system. Unfortunately, this response can also inadvertently lead to death through organ failure or secondary infections like (3) pneumonia. The flu virus has been nearly impossible to eradicate, largely due to its uncanny ability to mutate. Since just 2004, more than 5,000 different strains of the influenza virus have been sequenced. Those that affect humans are categorized as Types A, B or C, with Type A strains being the most capable of unleashing a pandemic. Influenza A viruses mutate more rapidly, allowing them to adapt to new hosts and even cross species. Avian flu and Swine flu, for instance, are two strains of Type A viruses that through mutations, can be transmitted from birds and pigs to humans. One of the deadliest flu (4) was caused by one such virus. Between 1918 and 1919, the Spanish flu infected a third of the global population and killed up to 50 million people worldwide. Called H1N1, this particular strain of virus likely came from birds. The threat of another influenza pandemic remains. In the meantime, scientists are constantly monitoring the flu virus and developing seasonal (5) to create our best line of defense.