There are individual risks associated with vaccinating preemies…
Preemies in Hospitals Have Breathing Problems After Vaccination
Info Wars Interview: Nurses Against Mandatory Vaccines
Adverse effects on vaccinating preemies
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2082954/table/tbl2/
Hospitalization and Mortality among infants by the number of vaccine doses and age
http://www.ncbi.nlm.nih.gov/m/pubmed/22531966/
Premature Infants Vaccinated and Incidence of Sepsis and Intubation
http://archpedi.jamanetwork.com/article.aspx?articleid=2300376&utm_source=silverchair+information+systems&utm_medium=email&utm_campaign=jamapediatrics%3Aonlinefirst06%2F01%2F2015
Package inserts for the 5-in-1 DTaP-Hib-Polio vaccines state that premature infants may develop apnea (pauses in breathing) following any pertussis containing vaccine.