the early vaccination trials of Edward Jenner and oneering efforts, vac nce of diseases such ng cougl Vaccination with DN A Active and Passive Immunization Designing Vaccines for Active Immunization mWhole-Organism Vaccines Purified Macromolecules as Vaccines Recombinant-Vector Vaccines DNA Vaccines Multivalent Subunit Vaccines mmon usage. Experience has shown that not every vaccine
General considerations Definition In placenta previa, the placenta is implanted in the lower uterine segment and located over the internal os. It constitutes an obstruction of descent of the presenting part. Main cause of obstetrical hemorrhage Incidence 0.24%-1.57% (our country)
