新的病毒在欧米克容和武汉病毒的基础上加了一个蛋白刺突，产生的病毒杀伤力更大，
Boston University researchers claim to have developed new, more lethal COVID strain in lab
Researchers at Boston University added a spike protein from the Omicron variant with the original Wuhan strain, which has an 80% kill rate
The variant, a combination of Omicron and the original virus in Wuhan, killed 80% of the mice infected with it, the university said. When mice were only exposed to Omicron, they experienced mild symptoms.
The research was conducted by a team of scientists from Florida and Boston at the school's National Emerging Infectious Diseases Laboratories.