[Methodological principles of the determination of the information value of laboratory evaluation of the immunogenicity and reactivity of vaccines].

The correlation between the reactogenicity and immunogenicity characteristics of different smallpox vaccines, determined under the conditions of a strictly controlled field trial, has been studied by a number of laboratory tests. The most informative and reproducible laboratory methods for evaluating the provisory antigenic and immunogenic potency of smallpox vaccines are the evaluation of the character of lesions developing in rabbits as a result of the intradermal injection of the virus and the determination of the capacity of the virus for multiplication in the skin of a rabbit (reproduction). The most informative and reproducible method for evaluating the provisory reactogenicity of smallpox vaccines for humans is the determination of the capacity of the virus for multiplication at elevated temperature.

[Detection of smallpox antibodies in human serum using the labeled-antibody technic].

Ninety-seven samples of human sera with various amounts of smallpox antibody were simultaneously compared in ELISA and HI test, and 26 of them were also studied in NT. Alongside with HI and NT, ELISA was shown to be highly sensitive and reproducible, and useful for simultaneous examination of a large number of sera.

[Comparative study of the smallpox vaccines from B-51, EM-63 and L-IVP in a controlled epidemiological experiment. II. The characteristiics of the immunogenicity of the smallpox vaccines].

Immunogenicity of smallpox vaccines prepared of EM-63, L-IVP, and B-51 strains was studied under conditions of strict controlled epidemiological trial. Skin reactions to revaccination and vaccines antigenic activity indices were detemined in the persons vaccinated. Changes in the virus-neutralizing and antibodies suppressing hemagglutination was the same in persons vaccinated with any of the preparations tested.

[Bacteriophages isolated from smallpox vaccine].

A number of lots of dermal and tissue culture smallpox vaccine was studied for the presence of bacteriophage. The presence of bacteriophage was established in lots of tissue culture vaccine but not in the dermal vaccine. Bacteriophage was detected by a modified method for phage isolation.