| different protection rates in various groups of volunteers given subunit influenza virus vaccine in 1976. | different rates of protection were observed in various groups of volunteers given trivalent subunit influenza virus vaccine during an epidemic caused by a/victoria/3/75 strains of influenza virus in melbourne, victoria, australia, in 1976. the degree of protection varied from 80% protection from infection in one group to a moderation in the severity of clinical illness in a geriatric group. the response to immunization may depend on the previous experience of the vaccinees, and it may be necessa ... | 1979 | 374644 |