A Study in Healthy Adults to Evaluate the Safety and Immunogenicity of Different Doses of JNJ-63871860

Participants will receive single vaccination of ExPEC4V dose (4 : 4 : 4 : 4) as an intramuscular (i.m) injection into deltoid muscle in part 1 (age groups \>=18 to \<50 years and \>=50 years) and part 2 (based on review of safety data by the IDMC). The ExPEC4V doses contain polysaccharide antigen (in microgram \[mcg\]) from the ExPEC serotypes O1A, O2, O6A, and O25B.

Participants will receive single vaccination of ExPEC4V dose (4 : 4 : 4 : 8) as an i.m injection into deltoid muscle in part 1 (age groups \>=18 to \<50 years and \>=50 years) and part 2 (based on review of safety data by the IDMC). The ExPEC4V doses contain polysaccharide antigen (in mcg) from the ExPEC serotypes O1A, O2, O6A, and O25B.

Participants will receive single vaccination of ExPEC4V dose (8 : 8 : 8 : 8) as an i.m injection into deltoid muscle in part 1 (age groups \>=18 to \<50 years and \>=50 years) and part 2 (based on review of safety data by the IDMC). The ExPEC4V doses contain polysaccharide antigen (in mcg) from the ExPEC serotypes O1A, O2, O6A, and O25B.

Participants will receive single vaccination of ExPEC4V dose (8 : 8 : 8 : 16) as an i.m injection into deltoid muscle in part 1 (age groups \>=18 to \<50 years and \>=50 years) and part 2 (based on review of safety data by the IDMC). The ExPEC4V doses contain polysaccharide antigen (in mcg) from the ExPEC serotypes O1A, O2, O6A, and O25B.

Participants will receive single vaccination of ExPEC4V dose (16 : 16 : 16 : 16) as an i.m injection into deltoid muscle in part 1 (age groups \>=18 to \<50 years and \>=50 years) and part 2 (based on review of safety data by the IDMC). The ExPEC4V doses contain polysaccharide antigen (in mcg) from the ExPEC serotypes O1A, O2, O6A, and O25B.

Participants will receive matching placebo (Tris-buffered saline) to ExPEC4V.