I can't speak for the majority of HN users, but I can speak for people who read serious medical research about vaccine safety and effectiveness (as I am one such person), and I can say for the record that there is plenty of evidence that vaccines have consistently resulted in reduced mortality and morbidity from a variety of diseases. Childhood death is now rare (it was once commonplace) largely because of improved sanitation and other public health measures around the globe but also because of vaccines.
http://www.sciencebasedmedicine.org/index.php/category/vacci...