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4) No Brasil, além do vírus influenza tipo A (H1N1), também circulam os vírus tipos B e C. A cada ano, a vacina disponibilizada para a população visa imunizar contra os tipos A e B, uma vez que o tipo C causa apenas infecções respiratórias brandas, não estando relacionado com epidemias. As vacinas em estoque que sobraram de uma campanha de vacinação não devem ser usadas para a campanha do ano seguinte.

Explique por que é necessário se vacinar anualmente contra a gripe.

Sagot :

GinnyAnsweridn

Final answer:

Influenza vaccines require annual updates to address the virus's mutation ability.


Explanation:

Influenza vaccines need to be developed annually due to the rapid mutation ability of the virus through antigenic drift and shift. This yearly change is necessary to provide protection against the evolving strains that may become dominant.


Learn more about Influenza vaccines here:

https://brainly.com/question/30051702


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