Social & Preventive Medicine BCG is the only widely used live bacterial vaccine. Which of the following statements is TRUE about BCG vaccination? A Distilled water is used as diluent for BCG vaccine B The site for injection should be cleaned thoroughly with spirit C Mantoux test becomes positive after 48 hours of vaccination D WHO recommends Danish 1331 strain for vaccine production 💡 Explanation BCG is the only widely used live bacterial vaccine. Which of the following statements is TRUE about BCG vaccination? ✓ Correct Answer: D. WHO recommends Danish 1331 strain for vaccine production