Production and testing in the USA of influenza virus vaccine made from the Hong Kong variant in 1968-69

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Citation
Murray, Roderick. (1969). Production and testing in the USA of influenza virus vaccine made from the Hong Kong variant in 1968-69. Bulletin of the World Health Organization, 41 (3-4-5), 493 - 496. https://apps.who.int/iris/handle/10665/262478