There are multiple definitions:

1. skilled birth attendance(English)

   • DHS, HHS, MICS, SIA, TTCV, UNICEF, WHO, BDHS
   • Pregnancy, Obstetrics, Neonatal situation
   • https://doi.org…109X(21)00338-7
   • https://doi.org…al.pone.0291790

2. serum bactericidal assay(English)

   • the method of choice to evaluate the complement-mediated functional activity of both infection- and vaccine-induced antibodies. To perform a typical assay, serial dilutions of sera are incubated with target bacterial strains and complement
   • CFU, MAE, hSBA, FHbp, MenB
   • Bacteriology, Microbiology
   • https://doi.org…al.pone.0172163
   • https://doi.org…28/CVI.00121-17

3. single-best answer(English)

   • questions are widely used for assessment in medical schools
   • MCQ
   • Education
   • https://doi.org….1111/tct.12445