I. Read the text and answer the following questions.

1. What is the cause of influenza?

2. What types of viruses, causing influenza do you know?

3. What eire constitutional symptoms of influenza?

4. What are mild cases of influenza characterized by?

5. How do the fulminant fatal cases manifest?

6. Are there vaccines for prevention influenza?

II. Complete the following sentenses.

S^. Epidemics occur ....

1. Symptoms in the respiratory tract ... .

2. In mild cases the temperature ... .

3. Crepitant and subcrepitant rales ... .

4. Local reactions to the vaccine ... .

III. Say whether the following statements are true.

1. Chilly sensations and fever are the clinical influenza manifesta­tions.

2. ^In severe cases the temperature reaches 102 F.

3. Secondary bacterial pneumonia occurs with the presence of persis­tent fever and cough.^

4. There are different types of vaccine for each influenza strain. ^

5. Usually there is no any reaction to vaccination, ^ —

IV. State the function of Infinitives in the following sentences.

1. The effect produced by the vaccine was too severe to be considered safe.

2. Much remains to be said about efficacy of vaccination.

3. We have had an opportunity to see a large number of children with severe post influenza complications.

4. The doctors expects the child to respond well to the treatment.

5. They believe the course of therapy to be repeated as needed.

Jf. Express the following in one word:

1. an extensive outbreak or period of unusually high incidence of dis­ease;

2. elevation of the body temperature above the norm;

3. difficult or laboured breathing;

4. an abnormal sound arising within the lungs or air passage and heard on ausculation over the chest;

5. extreme weakness.

4 < * ¹ \

Keys: rales, prostration, epidemic, fever, dyspnea.