Viral engineering is a scientific technique that involves modifying viruses to achieve specific goals, such as delivering genes to treat diseases or creating vaccines. By altering the virus's genetic material, researchers can enhance its ability to target specific cells while minimizing harmful effects on healthy tissues. This approach is widely used in fields like gene therapy and vaccinology. For instance, engineered viruses can be designed to carry therapeutic genes into cells affected by conditions like cancer or genetic disorders. This innovative method holds promise for developing new treatments and improving existing medical therapies.