Scientists believe the mutations may allow the virus to better bind to receptors in the upper airways of humans — something they say is concerning but not a cause for alarm.
Azerbaijan’s minister of digital development and transportation, told local media that “preliminary conclusions by experts point at external impact,” as does witness testimony.
The attack was one of several in China in late October and November and caused Chinese leader Xi Jinping to order local governments to take steps to prevent future “extreme cases.” ...