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A Phase I, dose-escalation trial in adults of three recombinant attenuated Salmonella Typhi vaccine vectors producing Streptococcus pneumoniae surface protein antigen PspA.
Frey SE, Lottenbach KR, Hill H, Blevins TP, Yu Y, Zhang Y, Brenneman KE, Kelly-Aehle SM, McDonald C, Jansen A, Curtiss R 3rd. Frey SE, et al. Among authors: kelly aehle sm. Vaccine. 2013 Oct 1;31(42):4874-80. doi: 10.1016/j.vaccine.2013.07.049. Epub 2013 Aug 3. Vaccine. 2013. PMID: 23916987 Clinical Trial.