Wearing a seatbelt does in fact increase risk to you of serious harm in certain kinds of accidents. It also protects those around you, as you are held into the driving position in your vehicle, so are less likely to lose/be unable to regain control of your car.
Vaccines protect the herd -- this is not "random people" but the people you come into contact with each day.
The next time a vaccine starts shooting random people, let me know.
You do indeed have the right to get the flu instead of a shot. However, by exercising that right, you are putting people in harms' way that would otherwise be more protected. That's a decision you get to make. Other people have made the decision to get vaccinated, which indirectly benefits you, as long as enough people get vaccinated.
We keep learning about the companies that make these and how the effectiveness is way lower than they have been telling us, or it turns out to cause cancer.
Who is we? I haven't been hearing these things. There are some non-approved vaccines that have side effects that are considered worth the risk in the middle of a pandemic -- are those the ones you're referring to? They have nothing to do with chicken pox, nor with the flu virus, nor MMR (the vaccines discussed in this thread so far).
Flu vaccines are a crap shoot -- I never used to get them, but now I do, as it costs me nothing. The reason they're a crap shoot isn't because they're not effective though; it's because they only target one strain. Vaccine companies look at what's brewing in China at the beginning of their flu season, and then inoculate against that in North America so by the time flu season hits NA, enough people are inoculated to the most likely strain, protecting the herd. This year, they guessed wrong, and a different strain made the hit list. Result? A greater number of child and elderly deaths due to influenza.
Everyone was still inoculated against the strain that went nowhere; nobody was inoculated against the strain that became pandemic. Was the vaccine effective? Not at minimizing flu exposure, but it WAS effective at minimizing exposure to the target strain -- in China, before it ever spread anywhere else.
The main reason vaccines don't work as well as we are led to expect is that what many people hear regarding vaccines is "get this shot to be protected from viral family X" when, as I originally stated, that's not what vaccination is about at all.
Vaccines are pretty simple; reviewing them is pretty simple, and delivering them without side effects is getting simpler as time goes by. Stay away from "live strain" vaccines, and at worst you're injecting junk into your muscle tissue that your lymph nodes have to collect and dispose of (or in a minority of cases, your body marshals its T cells and histamine chains, and the NEXT time you're exposed, you go into shock).