DR. ANTHONY FAUCI: SARS, with some exceptions, is spread by droplet. So that in order for me to infect you if I had SARS, I had to really be coughing and get visible droplets to contaminate you, is the usual way it’s spread.
http://www.pbs.org/wnet/wideangle/interactives-extras/interviews/h5n1-killer-flu-dr-anthony-fauci/2519/