Safety, Tolerability, and Immunogenicity Study of Homologous Ad26 Mosaic Vector Vaccine Regimens or Heterologous Ad26 Mosaic and MVA Mosaic Vector Vaccine Regimens With Glycoprotein 140 (gp140) for Human Immunodeficiency Virus (HIV) Prevention

Recombinant replication-deficient Ad26 vectored vaccine and consists of 3 Ad26 vectors, one containing a mosaic insert of envelop (Env) sequence, and 2 vectors containing mosaic inserts of Gag and Pol sequences (Ad26.Mos.1.Env + Ad26.Mos1.Gag-Pol + Ad26.Mos2.Gag-Pol). Total dose is 5\*10\^10 viral particle per 0.5 milliliter (mL) injection administered intramuscularly.

Recombinant live attenuated MVA virus-vectored vaccine that has been genetically engineered to express 2 mosaic Gag, Pol, and Env sequences (Mosaic 1 and Mosaic 2). Total dose is 10\^8 plaque-forming unit per 0.5 mL injection administered intramuscularly.

The gp140 DP vaccine containing 50 mcg of total protein, mixed with aluminum phosphate adjuvant (0.425 mg aluminum), per 0.5 mL injection administered intramuscularly.

The gp140 DP vaccine containing 250 mcg of total protein, mixed with aluminum phosphate adjuvant, per 0.5 mL injection administered intramuscularly.

Normal saline, 0.5 mL injection administered intramuscularly.