Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Shigewa: Kusan dukkan kwayoyin cuta na iya haifar da maganin rigakafi. Samun nasara da kawar da nau'ikan ƙwayoyin cuta daban-daban na buƙatar bambancin tsakanin ƙwayoyin cuta; abun da ke cikin amino acid ya bambanta yana ba su damar yin hulɗa tare da antigens daban-daban. An kiyasta cewa mutane suna samar da kwayoyin cuta daban-daban kimanin biliyan 10, kowannensu na iya ɗaure wani nau'in epitope na antigen. Kodayake ana samar da tarin kwayoyin cuta daban-daban a cikin mutum ɗaya, yawan kwayoyin halittar da ake da su don yin waɗannan sunadarai an iyakance su da girman kwayar halittar mutum. An samo hanyoyin kirkirar kwayoyin halitta da yawa wadanda ke ba da damar kwayoyin B na kashin baya su samar da tarin kwayoyin cuta daban-daban daga karamin adadin kwayoyin antibody.  Tambaya: Nau'in ƙwayoyin cuta nawa ne za su iya haifar da maganin rigakafi?
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