Cuales virus informat

Hay muchos tipos distintos de VPH. Pero hay una vacuna que puede evitar que estos problemas de salud ocurran. Usted puede contraer el VPH al tener relaciones sexuales orales, vaginales o anales con una persona que tenga el virus. Se transmite con mayor frecuencia durante las relaciones sexuales vaginales o anales.

Toda persona sexualmente activa puede contraer el VPH, incluso si tiene relaciones sexuales con una sola persona. La vacuna contra el VPH es segura y eficaz. Si usted es sexualmente activo:.

No hay una prueba para determinar si una persona tiene o no el VPH. Structure: A typical virus consists of a protective protein coat, known as a capsid. The capsid shape varies from simple helical and icosahedra forms to more complex structures with tails.

The capsid provides protection for the viral genome against the environment and functions in receptor recognition, targeting the virus to a susceptible host and cell type. Inserted into the lipid envelope there are usually viral encoded proteins know as spike projections — these are typically glycoproteins and are also involved in receptor recognition and viral tropism. A classical example of this is the neuraminidase and haemagglutinin glycoproteins expressed on the surface of the influenza A virus.

Virus tropism: Viruses are the most abundant and diverse pathogens on earth. Millions of years of evolution, in close proximity to their hosts, has resulted in highly precise mechanisms in which they target and infect host cells. The first stage of viral tropism is determined by the route of infection needed to gain access to the specific host tissue. For example the influenza A virus is transmitted through infected aerosols during coughing and sneezing, which allows the virus direct access to the respiratory tract where its target cells are located.

After gaining access to the specific host tissue, target cell infection is achieved at the initial stage of virus replication when the virus recognises and binds to a receptor on the target cell surface.

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