Since it occurred only rarely, it was unlikely to be an antigen caused by genetic variation in human blood.
由于这种抗原很少出现，因此它不可能是由于人类血液中遗传变异形成的抗原。
2
Methods: According to the principle and methods of the WHO stipulation, the influenza epidemic strains, antigen, gene variation, serum antibody and virus multi-pathogen were monitored.
方法：按who规定的原理和方法进行：对流感流行株、抗原和基因变异以及血清抗体和病毒多病原实行监测。
3
Some infected people have innate has a particular type of person histocompatibility antigen, one of about 96% of the cells infected with a variation of inner HIV.