L5 viral respiratory tract infection 1

 Lecture video 




Identify the False statement about the influenza viruses subtypes A, B, and C:
a) Influenza type A may be found in chickens, pigs, and horses
b) Antigenic shifts or viral genome reassortment occurs in Influenza A virus
c) All three types of viruses are found in humans and other animals

• Identify the influenza virus serotype that causes most of the pandemics:
a) Type A
b) Type B
c) Type C
d) None of the above

• A 16-year-old girl came to the clinic with a sore throat, fever, and headache, the symptoms resembled seasonal influenza flu. Which of the following primary samples/specimen is collected for the laboratory diagnosis of the influenza virus?
a) Blood
b) Sputum
c) Urine
d) Nasopharyngeal washing

• Major antigenic changes in HA or NA are known as an antigenic shift which results in a new influenza virus subtype, True or False?
a) True
b) False

Since the symptoms caused by the influenza virus and COVID-19 are similar, the flu vaccine can prevent COVID-19 infections

• Which of the following are NOT the common symptoms of flu caused by the influenza virus in adults?
a) Fever
b) Cough
c) Rashes
d) Headache

• Which of the following person can be at risk of contracting the flu?
a) A 70-year-old woman
b) A healthy 4-year-old boy
c) A 35-year-old man with diabetes
d) All of the above

Formalin killed chick embryo vaccine is given intranasally
a) True
b) False

The neuraminidase spikes destroy the receptors on the cells leading to rapid release of the virus
a) True
b) False

Which of the following statement is NOT correct about the preventive measures of the influenza virus?
a) Washing hands more often helps
b) A sick person with flu should stay isolated at least for 24 hours
c) Over the counter (OTC) antiviral drugs are available for the influenza virus
d) Live attenuated and inactivated viruses both are used for vaccination


1) C
2) A
3) D
4) A
5) B
6) C
7) D
8) B
9) A
10) c