9) To prevent infectious diseases the following practices should be observed
A) Use of face mask
B) Boostimmune system
C) Washing hands regularly
D) All of the above are correct.
10) What type of disease has these underlying common symptoms of long
duration of cough blood-streaked sputum chest pain night sweats and
weight loss
A lbronchitis
C) emphysema
D )tuberculosis
B) pneumonia​