LONDON—The World Health Organization is acknowledging the possibility that COVID-19 might be spread in the air under certain conditions—after more than 200 scientists urged the agency to do so.
In an open letter published this week in a journal, two scientists from Australia and the United States wrote that studies have shown “beyond any reasonable doubt that viruses are released during exhalation, talking, and coughing in microdroplets small enough to remain aloft in the air.”
