Monoclonal antibodies and small-molecule inhibitors have been the primary treatment methods for many types of cancer for many years, but new studies may change that. Peptides, proteins made of small chains of 10 to 50 amino acids, are being examined as possible cost-effective, more successful, safer anticancer vaccines. Researchers have identified two regions on the HER1 (also known as the EGFR) protein as possible targets for these peptide-based drugs. These agents could be used in the treatment of lung cancer, breast cancer, colorectal cancer, and head and neck cancers. If successful, the EGFR-targeting peptide vaccines could be combined with immunotherapies for the HER2 and VEGF proteins, possibly reducing the likelihood that the cancer will develop resistance to the treatment, a common pitfall of monoclonal antibody drugs such as cetuximab (Erbitux).