This Week in Cell

Researchers from Israel, the US, and the UK explore the evolutionary events that may reintroduce virulence to the attenuated polio virus strain used in vaccines. The team did a phylogenetic analysis focused on more than 400 circulating vaccine-derived polioviruses, folding in theoretical analyses and findings from new genome sequencing on attenuated oral polio vaccine type 2 viruses that were shed a couple weeks after vaccination in 11 vaccinated individuals.

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Researchers have treated an X-linked genetic disease affecting three babies in utero, Stat News reports.

The Associated Press reports that the US Centers for Disease Control and Prevention is beefing up sequencing as a tool to investigate foodborne illnesses.

Researchers have sequenced samples from ancient toilets to study past eating habits and health, NPR reports.

In Nature this week: ash dieback disease fungal genome, and more.