Researchers allegedly create a new 'controllable, reversible' gene-editing method in China
"Cas13 can degrade both target and non-target RNAs at random," making it difficult to design experiments and interpret results when using Cas13, the researchers explained on the CAS website. But "the CRISPR-based gene editing tool does not permanently change the genome, and the effects of editing are controllable, reversible, and safer," he added.
https://interestingengineering.com/science/scientists-new-gene-editing-technique-china