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Journal
Vaccine
Volume
17 Suppl 2
Pages
S22-7
Publication year
1999
Suggested citation
Levine MM, Ferreccio C, Abrego P, Martin OS, Ortiz E, Cryz S. Duration of efficacy of Ty21a, attenuated Salmonella typhi live oral vaccine. Vaccine. 1999; 17 Suppl 2: S22-7.
PMID
10506405