الوسم: الامارات

Norwalk virus is called the “winter virus”because it is common in winter. You can get it from shellfish. But the viruscan also pass from a person to fresh vegetables. A cook with dirty hands cancause an outbreak. In an outbreak, hundreds or even thousands of people get illat the same time. Outbreaks usually occur in hospitals, hotels or schools.
The virus is named after the town of Norwalk, inthe northern USA.In 1968, more half the students and teachers at the primary school became ill.Scientists found the cause after four years. Now many different viruses in foodare called Norwalk,Norwalk-like or Noroviruses.
If you cook shellfish properly, you will kill the virus. If you wash your handsbefore cooking, you will not pass the virus on. People usually become illwithin 48 hours. The symptoms last for two or three days. The illness is notfatal People recover with no long term problems.

2-Norwalk virusis common in —————
a) Winter b- Summer c-Spring d- Autumn
3- Norwalkusually appears in————————– food
a) shellfish b)- frozen c)- fats d)- carbohydrates
4- If you cook shellfish properly, youwill the———————- virus.
a) pass b) kill c)cure d)find
B-What do the underlined words in the passage mean?
1 –The word(dirty) line 2 means———————
a- clean b- not clean c- pure d-good
2 -The word (occur) line 4 means———————-
a-happen b- recover c- finish d- start
3- How long do the symptoms of the illness last?
a-one day b- twoor three days c- five days d- four days

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