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British Medical Journal logoLink to British Medical Journal
. 1974 Dec 28;4(5947):767–768. doi: 10.1136/bmj.4.5947.767-c

Letter: Cross-immunity to influenza B virus strains.

L M De Silva, P R Mortimer, D P Casemore
PMCID: PMC1612759  PMID: 4613428

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