Relation between Hong Kong virus and former human A2 isolates and the A-EQU12 virus in human sera collected before 1957
- PMID: 4180894
- DOI: 10.1016/s0140-6736(69)92544-6
Relation between Hong Kong virus and former human A2 isolates and the A-EQU12 virus in human sera collected before 1957
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