Experimental Vaccine Shows 73% Efficacy Against Salmonella Paratyphi A

Researchers may have developed the first vaccine against Salmonella enterica serovar Paratyphi A (S. Paratyphi A). In a phase 2b randomized trial (ISRCTN15485902), 2 doses of the oral, investigational live attenuated vaccine CVD 1902 showed 73%…