Question
Bivalent meningococcal vaccine is‑
| A. |
A Y |
| B. |
A C |
| C. |
C Y |
| D. |
A W-I35 |
Show Answer
|
Correct Answer � B Explanation |
 |
Ans. is ‘b’ i.e., A C
Two types of meningococcal vaccine develop
- Unconjugated polysaccharide vaccine.
- Conjugated group C vaccine.
Polysaccharide vaccines
- Internationally marketed meningococcal polysaccharide vaccines are o Bivalent (A and C),
- Trivalent (A, C and W-135)
- Tetravalent (A, C, Y and W-135).
- The vaccines are purified, heat-stable, lyophilized capsular polysaccharides from meningococci of the respective serogroups.
- A protective antibody response occurs within 10 days of vaccination.
- In schoolchildren and adults, one dose of these polysaccharide vaccines appears to provide protection for at least 3 years, but in children, under 4 years of age, the levels of specific antibodies decline rapidly after 2-3 years.
