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Communicable Diseases

What are the ...

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What are the symptoms of influenza?

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Solution

Symptoms of influenza include sore throat, cough, tiredness, headache and sneezing. It is a contagious respiratory disease that can cause mild to severe illness.

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Q. Which among the following is/are the symptom(s) of influenza?

How many statements regarding flu are incorrect?

i. Flu is caused by influenza virus.

ii. Its symptoms are milder than cold.

iii. The appearance of symptoms happen abruptly.

iv. Only rhinovirus can cause flu.

v. It can lead to serious complications like pneumonia.

Q. There are three major types of Influenza viruses: Influenza A, Influenza B, and Influenza C. All three types of viruses cause flu - like symptoms in humans including fever, muscle aches, headache, and fatigue, but only Influenza A can infect humans and other mammals as well as birds.
The letters H and N are included in naming many influenza viruses because the outer envelope of these viruses is covered with two types of glycoproteins, an H protein (hemagglutinin) and an N protein (neuraminidase). These glycoproteins enable viruses to bind to and fuse with the host cell plasma membrane.
The H1N1 Influenza A virus was responsible for the 1918 and 2009 deadly worldwide pandemics and genetic analysis revealed that H1N1 has a mixture of genetic material from pigs, birds, and humans.
Which of the following best explains how some Influenza A viruses have genetic material from a variety of host species?

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