Fact3 : there is on causal link between the administering of the vaccines and sudden infant death , however , there vaccines are administering at a time when babies can suffer sudden infant death syndrome (SIDS),... in other word, the SIDS deaths are co-incidental to vaccination and wold have occurred even if no vaccination had been given. it is important to remember that these four diseases are life-threatening and babies who are not vaccinated against them are at serious risk of death or serious disability.