Bus passenger: back when I rode mass transit I seldom if ever had even “casual physical contact” with my fellow commuters. If the ill person was spewing body fluids onto surfaces later touched by others there is a small risk, but presumably he was normally clothed, not incontinent, not throwing up or bleeding (if he had been 911 and an ambulance would likely have been called). That pretty much leaves “snot”. If, like most people he used a tissue, hanky, or shirt sleeve to sop that up and took it with him probably not transmitting ebola but yes, some risk of doing so.
That’s why the authorities mentioned it, so if someone gets sick they’ll go to a doctor and hopefully not be spreading it around to others.
People who clean public restrooms wear rubber gloves in my experience. Assuming the skin on their hands is intact, they use gloves, the gloves remain intact, they dispose of the gloves after they’re done cleaning/before doing something else like eating and also wash their hands… they’re probably OK. They do all that so they don’t catch every other disease germ living in public toilets. Ditto for most office/store cleaners for whom can emptying is a major part of their duties. Now, at the end of an evening shift where I work I do empty one trash can in my part of the store, but usually entails bunching up a long “tail” of plastic that hangs over the can. If it’s really sloppy I can pull another plastic bag over the offending can so I don’t have to touch anything icky. And the workplace provides plastic gloves for anyone who needs/wants them.
The biggest problem at public washrooms are people who can’t seem to hit a toilet bowl that’s wider than their ass. See various threads on this board about prehensile rectums and women who hover. Let’s assume until proven otherwise that this gent had sufficient bodily control to get all waste into the proper receptacles, because most people do. That should cut the risk to anyone else using the toilet to a minimum.
Cash at Walgreen’s? Again - snot/mucus is the most likely offender here, and even then, most people don’t hand over dripping bills and coins. If he paid with plastic likely no risk at all to the clerk if he swipes his own card through the machine.
Keep in mind, this guy voluntarily went to medical professions when he started to show symptoms. He knew he was at risk and he wasn’t wandering around town in a delirium spewing body fluids on passers-by. His contacts since his return have been tracked and will be monitored, and I’m guessing that he probably didn’t infect anyone casually - like Walgreen clerks. But maybe he did. The chances are higher than zero.
That’s why the public is informed and told to see a doctor if they have symptoms. Of course, this is going to overburden the ER’s with people coming in with mundane problems thinking they’re plague victims but that’s the trade-off here.
Most likely this will be limited to just one case. Maybe one or two close contacts. Could it spread farther? Yes, the chances of that are non-zero. We could also have an epidemic of superflu, too, but I’m not up nights worrying about it. It is highly unlikely, given that Dallas has modern sanitation and medical infrastructure, and given very different death and burial customs than, say, rural Africa, that this would be anything more than a localized outbreak
The US still has a half dozen to a dozen cases of the Black Plague, Yersinia pestis, every year, you know, the plague that at one point killed 1/3 of Europe? But we don’t have an epidemic of it, even when someone turns up with the pneumonic form of it, because of modern sanitation (we don’t tolerate flea-bearing rodents the way past peoples did) and because we do have a means of treating it. We understand its causes, how it is spread, and how to isolate the contagious.
For ebola, we understand its causes, how it spreads, and how to isolate the contagious. What we lack is a specific treatment but researchers are working on that, and just having something as basic as IV’s to keep an ill person hydrated and “supportive care” for symptoms can be life-saving.
Bottom line: it’s nasty, serious disease and it’s killing a lot of people in Africa, but it’s unlikely to become an epidemic in a First World country.
Untreated tuberculosis has a fatality rate north of 80%, which makes it deadlier than the current ebola strain which is “only” 60-70% fatal.
Of course, we can treat (most) TB, and it doesn’t kill you as quickly or make you leak blood out of every orifice.