On Monday, a group of more than 230 scientists signed a letter that urged WHO to acknowledge the potential for airborne spread.
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Alleganzi said more research must be done on the transmission possibilities, but acknowledged the risk of activities like gathering in groups in indoor spaces.
“And therefore, the possibility of airborne transmission in public settings, especially in very specific conditions crowded, closed, poorly ventilated settings that have been described cannot be ruled out. However, the evidence needs to be gathered and interpreted.”