Fighting Viruses


 
 
Concept Explanation
 

Fighting Viruses

Antibiotics do not work against viruses. However, sometimes when you have a viral infection, bacteria invade the body and cause secondary infections. These can usually be treated with antibiotics. Bronchitis and pneumonia are common secondary bacterial infections of a body weakened from fighting a virus. Your body can develop immunity to viruses in the same way as it does for bacteria. Despite this you can get flu more than once. This is because viruses are able to mutate, changing into new strains (varieties). For each new strain of flu virus, the body has to make new antibodies. Also, medical researchers have to make new vaccines for the new strains. Flu infections can make you feel very unwell and they can be fatal for people with low immunity, the elderly, the very young or those with other illnesses. Flu causes more than 4000 deaths in Australia each year. It is recommended that people at risk should be vaccinated each year.

Sample Questions
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Question : 1

Which of the following organism mutate frequently ?

Right Option : A
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Question : 2

It is difficult to kill the virus because ___________________

Right Option : B
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Question : 3

Antibiotics works against which of the following ?

Right Option : A
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