Anti-RSV peptide and a segment thereof derived from a peptide sequence identified in the human RSV fusion protein precursor F0. Another anti-RSV agent is carboxylated gold nanoparticles. A method is provided for attaching peptides to the carboxylated gold particles to produce additional anti-RSV agents to prevent or inhibit infection by the respiratory syncytial virus (RSV) and related viruses, including the human immunodeficiency virus (HIV).
