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Pigs and people, sadly for them and fortunately for us, are anatomically similar in shape and size, which makes them possibly fit to donate organs to humans – a process called “xenotransplantation”. As hazardous as this may sound, modern science is finding ways to make it safe. The major issue with xenotransplantation is that pigs have viruses (known as “porcine endogenous retroviruses”, or PERVs) “embedded in their own DNA”. When pig and human cells grow alongside, which happens after transplantation, those viruses may get passed across cells and cause diseases such as cancer.

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