Because it is a virus
'Intractable' means difficult to manipulate, or hard to manage.
The Flu virus is so hard to combat because viruses can not be killed you just have to tough them out.
YES
it is hard to manage when my health is not good
to work hard and honest
Edwin D. Kilbourne has written: 'The Influenza viruses and influenza' -- subject(s): Influenza, Influenza viruses 'Influenza' -- subject(s): Influenza, Influenza viruses, Orthomyxoviridae
hard to manage, not easily treated, stubborn, obstinate, and hard to move forward
Fungi do not cause influenza. Viruses Cause influenza.
To manage resources you have to work hard to own resources firstly. Having the right academic credentials will help you manage resources well.
influenza, flue
There is none since "flu" is already an abbreviation for "influenza".
Influenza is an infectious disease also commonly known as Flu. It’s an acute respiratory infection caused by Influenza Virus A and Virus B. Central BioHub's is an online biospecimen marketplace. It offers high-quality, well-defined influenza disease biospecimens collected from patients suffering from influenza infections. To check more visit our website.