1. Shedding of virulent poliovirus revertants during immunization with oral poliovirus vaccine after prior immunization with inactivated polio vaccine;Abraham;J. Infect. Dis.,1993
2. A controlled comparison of Haemophilus influenzae type B diphtheria toxoid conjugate vaccine given concurrently or in combination with DPT-IPV vaccine to 18-m;Barreto;Immunol. Infect. Dis.,1993
3. Stimulation of secretory antibody following oral administration of antigen;Bergmann;Rev. Infect. Dis.,1988
4. The elimination of polio in the Scandinavian countries;Bottiger;Public Health Rev. (Isr.),1993
5. Enhanced detection of poliovirus of vaccinees by RT-PCR;Buonagurio,1995