Influenza
Influenza virus – Two form A & B.
Influenza B – local out brakes
Influenza A – would wide pandemics.
Can form different antigen form – if major shift in antigenic make-up that helps for major pandemic.
1918 – 20 million death, 1957 and 1968 pandemics.
Bird flu (Avian Influenza) 2004/2006 – Asia, parts of Europe, the Near East, and Africa.
(the risk - the virus will change into a form that is highly infectious for humans and spreads easily from person to person.)
Fever, shivering and generalized aching in limbs.
Persistent cough, severe headache.
Can cause prolong debility and depression.
Secondary bacterial infections are common and lead to pneumonia.
Some might need antibiotics with complications.
Vaccine protect only 70% and last only one year.