lououlei 小五上 (2016/11/18 12:55)
varicella can be transmitted by air droplet according to WHO POSITION PAPER 2014
therefore i think , all OF THE ABOVE CHOICES can be transmitted by droplet. SO suggested the answer should be " 以上皆非" .
Tina Pon 高三下 (2017/01/17 17:13)
lououlei 小五上 (2017/01/18 09:51)
What is transmission by droplet contact?
Some diseases can be transferred by infected droplets contacting surfaces of the eye, nose, or mouth. This is referred to as droplet contact transmission. Droplets containing microorganisms can be generated when an infected person coughs, sneezes, or talks. Droplets can also be generated during certain medical procedures, such as bronchoscopy. Droplets are too large to be airborne for long periods of time, and quickly settle out of air.
Droplet transmission can be reduced with the use of personal protective barriers, such as face masks and goggles. Measle...