Viruses and the placenta: the essential virus first view

@article{Villarreal2016VirusesAT,
  title={Viruses and the placenta: the essential virus first view},
  author={Luis P. Villarreal},
  journal={APMIS},
  year={2016},
  volume={124},
  pages={20 - 30}
}
A virus first perspective is presented as an alternative hypothesis to explain the role of various endogenized retroviruses in the origin of the mammalian placenta. It is argued that virus–host persistence is a key determinant of host survival and the various ERVs involved have directly affected virus–host persistence. 
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