A. INTESTINE B. ATTRACTIVE C. EFFICIENT D. ARGUMENTREAD THE FOLLOWING...

Câu 10:

A. intestine

B. attractive

C. efficient

D. argument

Read the following passage and mark the letter A, B, C, or D on your answer sheet to

indicate the correct answer to each of the questions.

Swine influenza (also called swine flu, hog flu and pig flu) is an infection of a host animal

by any one of several specific types of microscopic organisms called “swine influenza virus”.

A swine influenza virus (SIV) is any strain of the influenza family of viruses that is usually

hosted by (is endemic in) pigs. As of 2009, the known SIV strains are the influenza C virus

and the subtypes of the influenza A virus known as H1N1, H1N2, H3N1, H3N2 and H2N3.

Swine influenza is common in pigs in the mid-western United States (and occasionally in

other states), Mexico, Canada, South America, Europe (including the UK, Sweden and Italy),

Kenya, Mainland China, Taiwan, Japan and other parts of eastern Asia.

Transmission of swine influenza virus from pigs to humans is not common and does not

always cause human influenza, often only resulting in the production of antibodies in the

blood. The meat of the animal

poses

no risk of transmitting the virus when properly cooked.

If transmission does cause human influenza, it is called zoonotic swine flu. People who work

with pigs, especially people with intense exposures, are at increased risk of catching swine

flu. In the mid-20th century, identification of influenza subtypes became possible, this

allows accurate diagnosis of transmission to humans. Since then, fifty confirmed

transmissions have been recorded, rarely, these strains of swine flu can pass from human to

human. In humans, the symptoms of swine flu are similar to those of influenza and of

influenza- like illness in general, namely chills, fever, sore throat, muscle pains, severe

headache, coughing, weakness and general discomfort.

The 2009 flu outbreak in humans, known as “swine flu’, is due to a new strain of influenza

A virus subtype H1N1 that contains genes closely related to swine influenza. The origin of

this new strain is unknown. However, the World Organization for Animal Health (OIE)

reports that this strain has not been isolated in pigs. This strain can be transmitted from

human to human, and causes the normal symptoms of influenza.