Concept explainers
(1)
To determine:
Why do people who are immunized sometimes still get the flu? What do the letters A, H, and N stand for in the name A (H5N1)? Why are epidemiologists particularly concerned about bird influenza viruses.
Case summary:
Wang Fang is too sick, he had a fever of about 104ᵒ F for two days and dizzy, nausea, tiredness, vomiting. After that, she slowly develops running nose, dry cough, and severe sore throat. She had influenza A virus infection (H5N1), which is a commonly known as swine flu. This virus has a novel RNA strain that is emerged from the antigenic shift that occurs once in a decade. This new strain gives an adverse effect because of the different antigenic combinations. This type of antigenic combinations is new to the adaptive immune system and hence it requires a long period of time to cure this infection. Symptoms are appearing in this time period. Wang Fang has survived this flu, but many other patients could not survive with this flu.
(2)
To determine:
What do the letters A, H, and N stand for in the name A (H5N1)?
Case summary:
Wang Fang is too sick, he had a fever of about 104ᵒ F for two days and dizzy, nausea, tiredness, vomiting. After that, she slowly develops running nose, dry cough, and severe sore throat. She had influenza A virus infection (H5N1), which is a commonly known as swine flu. This virus has a novel RNA strain that is emerged from the antigenic shift that occurs once in a decade. This new strain gives an adverse effect because of the different antigenic combinations. This type of antigenic combinations is new to the adaptive immune system and hence it requires a long period of time to cure this infection. Symptoms are appearing in this time period. Wang Fang has survived this flu, but many other patients could not survive with this flu.
(3)
To determine:
Why are epidemiologists particularly concerned about bird influenza viruses.
Case summary:
Wang Fang is too sick, he had a fever of about 104ᵒ F for two days and dizzy, nausea, tiredness, vomiting. After that, she slowly develops running nose, dry cough, and severe sore throat. She had influenza A virus infection (H5N1), which is a commonly known as swine flu. This virus has a novel RNA strain that is emerged from the antigenic shift that occurs once in a decade. This new strain gives an adverse effect because of the different antigenic combinations. This type of antigenic combinations is new to the adaptive immune system and hence it requires a long period of time to cure this infection. Symptoms are appearing in this time period. Wang Fang has survived this flu, but many other patients could not survive with this flu.
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