Whey proteins (LF, ALA, and mucin1) obtained from human breast milk showed strong antiviral roles against different SARS‐CoV‐2 variants (α, β, γ, and κ), as these can inhibit viral infection at all stages of replication cycle, that is, attachment [by binding to heparan sulfate proteoglycans (HSPG) receptors], entrance, and postentrance replication (Lai et al., 2021). The gene discussed is LTF; the disease is viral infectious disease.