US scientists planned to make viruses in Wuhan with SAME features of Covid year before outbreak
https://www.thesun.co.uk/news/25415847/scientists-virus-experiments-wuhan-same-features-covid/
A "furin cleavage site" refers to a specific sequence of amino acids in a protein that can be cleaved by an enzyme called furin. It's present in SARS-COV-2, not in other coronaviruses.