How could a microbiologist make a mistake like that?
From what website did you cut-and-paste that study?
if you had read the post you would see that it was posted from PubMed...
anyone who was interested in verifying it could have done a simple search at PubMed...
"While DPT immunisation might prevent some unexplained infant deaths due to asymptomatic whooping cough, these data indicate that immunisation with DPT also induces antibodies cross-reactive with pyrogenic staphylococcal toxins implicated in many cases of SIDS."