Not sure most would call these measures "simple", but they do indeed seem like something we could do. It wouldn't be hard, though, for some of these simple measures to kill more people than they save, via collateral damage.

Another point to consider is that this virus is apparently "novel", meaning that humans in general have not had time to build up significant immunity. Even if measures are taken, they will likely just push the date of infection for each individual out into the future some--most people will eventually be exposed no matter what.