Where did I say they were lying? They're saying the risk is currently low, and it is currently low based off of available evidence which is that there are 2 cases in Toronto. Public speculation isn't part of their professional toolkit, they deal with confirmed facts when releasing public information.
Reasonable speculation isn't a ridiculous activity at this point for members of the general public.
If you often find yourself coming down with a cold after taking a flight, take note: by mapping the spread of a virus through an aeroplane cabin, researchers have found that your chances of getting the sniffles largely depend on how much you move about.
www.sciencealert.com
So what do we know?
-We know that an infected person was in a tube for 18 hours with approx 300 other people
-We know that there is a very high likelihood that other people on the plane were infected. According to research, we can expect at least 10-15 additional infections from the people on the plane (and that's a conservative estimate based on the infected gentleman not getting up for 18 hours). Now, it's possible that public health officials have gotten their hands on everyone who is at higher risk, quarantined them and tested them....but we haven't heard anything about that to my knowledge. So it's not unreasonable to expect that those 10-15+ people are roaming around in there public lives coming within 2 metres of a number of people.
-We know that an infected person can be fully contagious, but not symptomatic for 14 days.
No, I don't think Public Health officials are "lying", but they're also not saying everything there is to say, because that's just the appropriate level of message control right now.