“We found that flu cases contaminated the air around them with infectious virus just by breathing, without coughing or sneezing,” Dr. Donald Milton, professor of environmental health in the University of Maryland School of Public Health, said in a statement.
“People with flu generate infectious aerosols even when they are not coughing, and especially during the first days of illness,” he said. “So when someone is coming down with influenza, they should go home and not remain in the workplace and infect others.”
Boldfaced emphasis added by me.
The 1918 flu virus attacked places that were far, far away from population centers. Isolated islands.
How else to account for that except via airborne transmission that’s not necessary for direct contact with infected people?
Air transmission has always been the case.
Keep up, science!