Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla Biyu matakai suna motsa antigens don canzawa: antigenic drift da antigenic shift.
Tabbas, wani nau'i mai rikitarwa na jumla shi ne "Hanyar guda biyu suna motsa antigens don canzawa: antigenic drift da antigenic shift, antigenic drift shine mafi yawan. "