FIELD: chemistry.
SUBSTANCE: invention relates to biotechnology. The method of treating or preventing a PCV2 infection or reducing clinical symptoms caused by or associated with a PCV2 infection in animals, having anti-PCV2 antibodies, involves single-step administering of an effective amount of a PCV2 antigen to the animal in need of such treatment or preventive treatment.
EFFECT: use of the disclosed method prevents adverse interaction of maternal anti-PCV2 antibodies with the PCV2 antigen, thereby becoming real vaccination or treatment for animals aged up to 3 weeks.
18 cl, 3 dwg, 5 tbl, 4 ex
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