I feel like we are about to enter the variation on the prisoner's dilemma where we all get a massive benefit if at least 70% of us get the vaccine, but getting the vaccine has a cost (please roll a D20 to select your random side effect) so everyone has an incentive to be one of the shirkers.
I foresee things getting ugly as we collectively all get together to shame, bully and trick the shirkers into compliance.
I’ll allow that there is seemingly a significant portion of the population who believes they don’t personally benefit from a vaccine, but your comment said -everyone- is incentivized to shirk: that’s just not true.
Of course this depends on the unknown factor of how bad the side effects are, if they are nonexistent then it's a different story, but if they are on average as bad as a flu shot then it becomes tricky.
I suppose I'm really thinking in the context of countries like Australia which have essentially eradicated the virus. My risk of getting the virus right now is practically zero, so my only incentive to get vaccinated is that we can eventually reopen our borders once enough people are vaccinated. And personally I'm in no hurry to get flooded by foreign tourists anyway.