Strains of subtypes?
Subtypes are further divided into strains; each genetically distinct virus isolate is usually considered to be a separate strain.
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Controlling Infectious Diseases »Controlling Infectious Diseases
Diseases »Diseases
Influenza »Influenza
Background about Flu »Background about Flu
Types of Flu? »Types of Flu?
Influenza virus type A »Influenza virus type A
Subtypes of Influenza virus type A »Subtypes of Influenza virus type A
Strains of subtypes?
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