Each virion (virus particle) is made up of:
· a core: made up of 1 or 2 DNA or RNA molecules
· a capsid: a protein coat which enloses the core, it protects the genetic material (DNA) and helps it transfer from host to host ie: spread
· an envelope: only some viruses have this additional layer which surrounds the capsid
Some viruses will lie dormant within the body and this can also help the horse develop immunity. Viruses are usually 'host specific' so we can't catch horse flu, however, Rabies is an important exception and can transfer from species to species.
UK Equine Viruses include:
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