Poliomyelitis

Researchers are testing whether a new oral polio vaccine called nOPV2, given at birth, helps infants block type 2 poliovirus in their intestines. The trial enrolls 740 healthy newborns who have received standard injected polio vaccines. Scientists will check stool samples for sig…

This study tests a new oral polio vaccine (nOPV3) in healthy young children, infants, and newborns in Panama. The goal is to see if it is safe and triggers a strong immune response compared to the current vaccine. About 1,500 participants will receive either the new or existing v…

This study tests two types of inactivated polio vaccine (Sabin strain and wild strain) given in different orders to 480 infants aged 2 months. The goal is to see which sequence triggers the best immune response and causes the fewest side effects. Participants will receive three d…

This phase 4 study compares a single dose of an inactivated polio vaccine (sIPV) in people aged 7 to 50 years with the standard three-dose series given to infants. Researchers want to see if one shot can produce a similar immune response. The trial is recruiting 180 healthy parti…

This study tests a new oral polio vaccine (nOPV1) in over 2,200 healthy young children, infants, and newborns in Bangladesh. Researchers will compare it to the current Sabin vaccine to see if it is safe and triggers a strong immune response. The goal is to find a more stable vacc…

This study tests whether giving two new oral polio vaccines (types 1 and 2) together is safe and works as well as giving them separately in healthy 16-week-old infants. About 675 babies in Panama will receive either the combo or single vaccines. The goal is to see if the combo ap…