Flu's evolution strategy strikes perfect balance

Scientists have uncovered the flu's secret formula for effectively evolving within and between host species: balance. The key lies with the flu's unique replication process, which has evolved to produce enough mutations for the virus to spread and adapt to its host environment, but not so many that unwanted genomic mutations lead to the flu's demise (catastrophic mutagenesis). These findings overturn long-held assumptions about how the virus evolves...

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