Menveo and Menactra contain the same antigens as Menomune, but the antigens are conjugated to a diphtheria toxoid polysaccharide protein complex, resulting in anticipated enhanced duration of protection, increased immunity with booster vaccinations, and effective herd immunity.
12.
This was followed by another phase I trial in 1977-1978 examining previously sterilized women at 5 institutions in India with a more potent vaccine that combined the beta subunit of hCG with the alpha subunit of ovine luteinizing hormone to form a heterospecies diphtheria toxoid.
