H Odisseev

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A mumps vaccine, using strain Sofia 6 prepared in guinea-pig kidney primary cell cultures, was gradually introduced in Bulgaria to vaccinate 1- to 12-year-old children between 1972 and 1976. It was included in the national vaccine programme in 1977. The vaccine showed a slight reactogenicity, a good immunogenicity and a high epidemiological efficacy. Due to(More)
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