Salmonellosis

This study tests a new vaccine designed to protect against three common types of Salmonella bacteria that cause serious infections in Sub-Saharan Africa. The trial includes healthy participants ranging from adults down to young infants, and compares the vaccine to a placebo to se…

This study tests a new vaccine (iNTS-GMMA) designed to prevent severe Salmonella infections caused by two common strains. Researchers are giving the vaccine to healthy adults, children, and infants in Ghana to check if it is safe and triggers a strong immune response. The ultimat…

This large phase 3 trial is testing a typhoid conjugate vaccine (Vi-TCV) in 30,000 healthy children aged 9 months to 12 years in Malawi. Half get the typhoid vaccine, half get a meningitis vaccine for comparison. The goal is to see if the typhoid vaccine prevents blood-confirmed …

This study looks at HIV-negative people who get opportunistic infections—illnesses that usually only affect those with weak immune systems. Researchers want to find out if these patients have unusual antibodies that block a key immune signal. Up to 224 adults in Thailand and Taiw…

This study looks at whether taking an oral typhoid vaccine temporarily makes the gut more 'leaky' and how the immune system responds. Ten healthy adults will receive the vaccine and a low-dose aspirin challenge. Researchers will measure sugar levels in urine and immune cells in b…