Chapin:
"it's droplets".
Died in 1920s before air got big.
Winslow:
"it's droplets".
Died 1957 before air got big.
Langmuir (former head of CDC in the 1950s)
"it's droplets".
Regretted it at end of career.
Hall (doctor who conducted a widely-cited but terrible study in 1981 purporting to say RSV not airborne - it is, by the way):
"it's droplets".
Regretted it at end of career.