Antigenic shift
... is the process by which two different strains of
influenza combine to form a new subtype having a mixture ... immune system has difficulty recognizing the new
influenza strain, it may be highly dangerous.
Antigenic ... natural mutation over time of known strains of
influenza (or other things, in a more general sense) to ...
Avian influenza
... Avian
influenza (also known as bird flu ) is a type of
influenza virulent in birds . It was first identified ...
1 Infection
2 Avian
influenza in humans
3 Prevention and treatment
4 ...
Outbreak
... in a region), epidemic (an unusually high number of cases in a region), or pandemic (a global epidemic).
Major human epidemic viruses include
influenza , Human Immunodeficiancy Virus ( HIV ), measles , and rubella . Smallpox has been eradicated as a major epidemic virus, however emerging viruses ...
RNA virus
... not propagate.
Some RNA viruses:
Arenaviridae
Bunyaviridae
Flaviviridae : Yellow fever - Hepatitis C&G
Orthomyxoviridae :
influenza
Paramyxoviridae : Mumps
Picornaviridae : Polio
Reoviridae
Retroviridae : Human Immunodeficiency Virus
Rhabdoviridae : Rabies ...
Vaccine
... of vaccines, including those given to very young children, used thimerosal , a preservative that metabolizes into ethylmercury. It is used in some
influenza , DTP ( diphtheria , tetanus and pertussis ) vaccine formulations.
In the late 1990s, controversy over vaccines escalated in both the US and ...
Virus classification
...
Segmented negative stranded viruses
Family Arenaviridae
Family Bunyaviridae - e.g. Hantavirus
Family Orthomyxoviridae -
influenza viruses
Unassigned genera:
Genus Deltavirus ; type species: Hepatitis delta virus
Genus Ophiovirus ; type species: Citrus psorosis ...
Virus evolution
... can adapt to changes in their environment within months. Virus evolution is an important aspect of the epidemiology of viral diseases such as
influenza , HIV , hepatitis , and many others. It also causes problems in the development of successful antiviral drugs , as resistant mutations often ...