Airborne spread would mean more coronavirus risk Inside. Here are tips to protect yourself

But many, like UC Irvine chemistry professor Ann Marie Carlton, who signed the letter to the WHO,  say transmission through aerosols seems incredibly likely. “A certain kind of contortionist thinking is required to explain transmission in the absence of aerosol,” she said. … “We don’t want to scare people,” said Manabu Shiraiwa, also a chemistry professor at UC Irvine who signed the letter. “It’s important to acknowledge it,” he said, referring to airborne transmission, because then “we can do something about it.”