Origin

 NY Times: What We Know and Don’t Know About the Origins of Covid - Scientists and spy agencies have tried to determine where the coronavirus originated, but conclusive evidence is hard to come by and the nation’s intelligence agencies are split. By Sheryl Gay Stolberg and Benjamin Mueller

Scientists who have studied the genetics of the virus, and the patterns by which it spread, say the most likely cause is that the virus jumped from live mammals to humans — a scientific phenomenon known as “zoonotic spillover”