In reference to transmission of the virus. There does not appear to be any reason to believe it is not the same as the flu.
If you saw my posts above, you will note I was concerned the fact that it can be transmitted via the air was potentially over stated. It clearly can, but the concept of "breathing the same air" could create more concern than needed. I had the "normal" flu (?) a month ago, and was able to stay in the same house, and bedroom as my wife, and with good containment protocols did not get her (or another in the house) sick. There is also a case of one of the cruise ship patients that stayed in a small stateroom with his wife the entire time, and she did not get sick. I am sure they were careful also.
My guess (please feel free to interpret yourself): It is highly unlikely to get transmission from just being near an infected person that is breathing (unless you are REALLY close). If they are coughing, higher, if they are sneezing, WAY higher. Still avoidable though. This of course is a great reason to use some sort of cough rag, towel or handkerchief.
Here are the highlights and link to a good article on the subject:
Respiratory transmission depends upon the production of aerosols that contain virus particles. Speaking, singing, and normal breathing all produce aerosols, while coughing and sneezing lead to more forceful expulsion. While coughing may produce several hundred droplets, a good sneeze can generate up to 20,ooo. Aerosolized particles produced by these activities are of different sizes. The largest droplets fall to the ground within a few meters and will transmit an infection only to those in the immediate vicinity. Other droplets travel a distance determined by their size. Those droplets 1-4 microns in diameter are called ‘droplet nuclei’; these remain suspended in the air for very long periods and may not only travel long distances, but can reach the lower respiratory tract. Inhalation of droplets and droplet nuclei places virus in the upper respiratory tract, where it may initiate infection.
Here is an example noted of transmission (accidental experiment). One thing that is missing in this description though is at what stage the infected passenger was in (e.g. just infected but not showing symptoms, coughing, or sneezing)
The importance of aerosol transmission is illustrated by an outbreak of influenza aboard a commercial airplane in the late 1970s. The plane, carrying 54 persons, was delayed on the ground for three hours, during which time the ventilation system was not functional. Most of the travelers remained on board. Within 72 hours, nearly 75% of the passengers developed influenza. The source of the infection was a single person on the airplane with influenza.
http://www.virology.ws/2009/04/29/influenza-virus-transmission/
They also have an interesting link to some studies regarding humidity:
They found that transmission of infection was most efficient when the humidity was 20-35%; it was blocked at 80% humidity. The authors concluded that conditions found during winter, low temperature and humidity, favor spread of the infection. Lower humidity favors virion stability and smaller virus-laden droplets, which have a better chance to travel longer distances.
Another group re-analyzed Palese’s data and found that relative humidity explains only a small amount of the variability in influenza virus transmission and survival – 12% and 36%, respectively. When they converted the measurements of moisture to absolute humidity, the results were striking: 50% of the variability in transmission and 90% of the variability in survival could be explained by absolute humidity.
The conclusion of both papers is the same: humidification of indoor air during the winter might be an effective means of decreasing influenza virus spread.
http://www.virology.ws/2009/02/19/seasonality-of-influenza-revisited/