"The deadliest mutations in the Zhejiang patients had also been found in most patients across Europe, while the milder strains were the predominant varieties found in parts of the United States, such as Washington state, according to their paper. A separate study had found that New York strains had been imported from Europe. The death rate in New York was similar to that in many European countries, if not worse." A new study by one of China's top scientists has found the ability of the new coronavirus to mutate has been vastly underestimated and different strains may account for different impacts of the disease in various parts of the world. Professor Li Lanjuan and her colleagues from Zhejiang University found within a small pool of patients many mutations not previously reported. These mutations included changes so rare that scientists had never considered they might occur. They also confirmed for the first time with laboratory evidence that certain mutations could create strains