A 7 weeks old girl who is brought to the clinic because she…

A 7 weeks old girl who is brought to the clinic because she has a one day history of bloody stool, there is no travel history and she is on exclusive breast milk. Her immunization is up-to-date with the last one given at for 6 weeks. On examination she is pale, ill looking with a low grade fever of 37.5 ⁰C and a tender abdomen. The stools are jelly like.  Which immunization is likely to result in the above condition?