Modified CRISPR-Cas9 gene editing scissors are enabling researchers at the University of Zurich to make alterations to the genetic material of single-cell organisms that are indistinguishable from natural mutations. This method makes it possible to develop a harmless experimental live vaccine for the widespread parasite Toxoplasma gondii.
source https://phys.org/news/2020-12-genetic-unwanted-side-effects-parasites.html
