Yes, only of 12 million children younger than 5 in the US, "only" 0.2%, that is, 2 of 1000 infected would make 25000 vaccine preventable children deaths in one epidemics, if nobody would have been vaccinated.
To answer to wmboy's question "how does it compare to malaria" -- malaria wasn't treatable with vaccines up to now, there are very recent successes to develop one which is still only 25%-50% effective (has a relatively low efficacy and it was only recently, 2015, approved for use outside trials). https://en.wikipedia.org/wiki/Malaria_vaccine I don't think you'd like mosquitoes biting you if you would travel, for example, to Africa, where malaria is common.
To answer to wmboy's question "how does it compare to malaria" -- malaria wasn't treatable with vaccines up to now, there are very recent successes to develop one which is still only 25%-50% effective (has a relatively low efficacy and it was only recently, 2015, approved for use outside trials). https://en.wikipedia.org/wiki/Malaria_vaccine I don't think you'd like mosquitoes biting you if you would travel, for example, to Africa, where malaria is common.