Health

No vaccines ----> Children contract diseases such as whooping cough, tetanus, diphtheria, influenza, some of which are communicable/contagious. ----> They spread such germs to other children who also aren't vaccinated. ----> And the children go home and spread those germs, where their family contracts these syndromes. ----> With some people having weakened immunity, there will be people who will become disabled or will die.

It's more than "My child will be all right without the vaccines."