A
Ａnew coronavirus, from a certain animal, called COVID-l9 and regarded as a cousin of the SARS virus, has infected thousands of people since the outbreak began in Wuhan, China, in last December.
Here are somethings you should know about a coronavirus.
What is a coronavirus
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.
Coronavirus symptoms
The viruses can make people sick, usually with a mild(轻度) to moderate(中度) 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.
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, Srespiratory tract illness like a pneumonia(肺炎) or bronchitis(支气管炎) .There area handful of human coronaviruses that are known to be deadly.
How it spreads
Viruses can spread from human contact with animals. Scientists think MERS started in camels, according to the WHO .With SARS, scientists suspected civet cats(狸猫) were to blame.
When it comes to human-to-human transmission of the viruses, often it happens when Some one 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.
About a cure
We don't have a direct anti-coronavirus treatment. We can manage the patients through symptomatic care and supportive care, of course. And many patients already, the Chinese have said, have survived this infection.
2l.What can we learn about coronavirus?
A.They can be transmitted from humans to animals easily.
B.Their symptoms are similar to a common cold.
C.They are common among animals and humans.
D.Anti-coronavirus treatment is the best method of cure.
22.How will human-to-human transmission happened from a infected person?
A.By contacting with his secretions.
B.By calling him.
C.By speaking with him.
D.By shaking hands with him.
23.Why did the author write this text?
A.To call on being a doctor.
B.To offer some protection tips.
C.To introduce the cure of coronaviruses.
D.To help people avoid being infected by coronaviruses.
