Evolution
These viruses appear to have evolved ~120 years ago with a rapid increase in their population size within the last 40–60 years. They appear to have evolved initially in wild boars and subsequently spread to domestic pigs. The rate of evolution has been estimated to be 3.86 x 10−4 - 8.23 x 10−4 subsitutions per site per year. This rate is similar to other single stranded DNA viruses.
Read more about this topic: Porcine Parvovirus
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