TABLE 1.
Parameter | Caveat(s) for both vaccines (unless otherwise stated) |
---|---|
Source of data | These data combine multiple sources of information, including peptide sequence identity through whole-genome sequencing, experimental assays developed as indirect measures of the breadth of vaccine protection against diverse meningococci, and assays developed to assess immunogenicity. |
Protein expression | We have not inferred protein expression from genomic data; therefore, there may be isolates that possess genes but do not express the protein in vivo. |
Cross-reactivity definition | An antigenic variant was considered cross-reactive if it had been tested in ≥5 isolates/subjects and was above the accepted threshold in ≥3/4 of those isolates. This was established through combined analysis of published experimental studies (PubMLST ID no. [PMID] provided for each variant), not from genomic data. |
Meningococcal isolate source | These assays were based on serogroup B disease isolates for both vaccines. |
Experimental assays | |
Bexsero | MATS assay |
Trumenba | MEASURE assay, SBA assay |
Age of vaccinees | |
Bexsero vaccine | For MATS assay development, Bexsero vaccine recipients were infants who had received 3 doses of vaccine and then a booster at 12 mo. |
The pooled sera used for the MATS assay were taken from the toddlers at 13 mo of age. | |
Trumenba vaccine | The age of vaccine recipients in the experimental studies varies widely, ranging from toddlers to adults, and needs to be taken into consideration when interpreting results. |
Vaccine studies used different schedules and doses of vaccines. |
MenDeVAR, Meningococcal Deduced Vaccine Antigen Reactivity; MATS, meningococcal antigen typing system; MEASURE, meningococcal antigen surface expression; SBA, serum bactericidal activity.