Also, maybe it sucks, but if you have limited research resources, it's more efficient to try and develop a new vaccine to save millions of lives than it is to improve an old one and save dozens.
Or you could just spend more money on your PR and advertising. Like Merck did with the MMR. The Mumps part of the vaccine has been sold to us as being 95% effective. Well it seems they have been lying to the government and the population for a few decades now and it is much closer to 35% effective. Why spend money unwisely when you can control what people believe so easily. And anyone who doubts the effectiveness of a vaccine is labeled an "anti-vaxxer" who should be shot on sight. Yeah, the pro-vaxxers are such GREAT people! It totally makes me want to run out and get more of them just for fun!
Most vaccines are not 100% effective. You need a certain percentage of the population to be immune for herd immunity to mean that they have little chance of contracting the disease (and, if they do, a good chance of being an isolated statistic rather than the centre of an outbreak). It only takes a few percent opting out of the vaccine to eliminate the herd immunity and make the entire population more vulnerable.
Except it looks like the whole herd immunity thing is a theory without any evidence. In China, where it is mandatory to get vaccinated, they still have massive outbreaks. There are plenty of cases in the U.S. also where the vaccine itself was responsible for the outbreak and 95% of the UNVACCINATED local population went uninfected. It is thought to be unacceptable to do a double blind study with vaccines because they are considered to work. So you can't even prove if these things work because we have assumed they do. Nice scientific method there!
The problem you miss is that of immunocompromised or otherwise medically exempted individuals - namely, people who don't have a choice whether they get vaccinated or not. It's not just a personal choice - if you choose not to get yourself or your kids vaccinated, you are potentially putting my kids at risk by doing so.
Maybe those people should go live in a quarantined compound somewhere.
It's pretty clear that states with more stringent vaccination requirements have higher vaccination rates:
Higher vaccination rates don't mean much. Even places like China, where pretty darn near 100% of the school children are vaccinated still have massive outbreaks of the diseases they vaccinated for. The whole herd immunity thing is a myth and too many people fall for the lies the experts tell everyone.
It's safe. It's effective. This study is only for chickens and has no way of working in humans.
Where are your test systems and test cases?
This is probably a big part of the problem. People at home don't have a test system to screw around with. Even if they did, who wants to waste time doing crap like that. If the system is working now and updating it gives a chance of things breaking, don't update it. One woman they interview mentioned how she lost all her contacts in her smart phone when she updated the software. Yeah, I sure as hell would not update that any more. I don't do Microsoft updates either as safe computing gets me all the safety I need until I need to re-install the system due to bloat. Since Windows is only a gaming platform for me at this point, my re-installs are way down from what they used to be back in the XP days. Back then it would only be 12 - 18 months before a complete format and re-install would get things speedy again. I have heard that the bloat issue may not be as bad anymore, but I can't really verify since so few things are installed on it now.
I have also been putting off the update for my Galaxy S5 phone because I want to back everything up before doing it. Plus, when I actually do all the work of backing things up to mess with changing the firmware I am going to put Cyanogenmod on there anyway, so the stupid nagging update nag notice is just in my way. Once Cyanogenmod is there then the stupid update notices will be under my control and can be turned off or let them proceed since they don't screw up like Samsung would be likely to do.