A painless vaccine refers to the administration of a vaccine designed to minimize pain or discomfort. It's also known as the DaPT vaccine. This combination vaccine provides immunization against three diseases in a single shot: diphtheria, acellular pertussis (whooping cough), and tetanus.
In essence, a painless vaccine aims to make the vaccination process less traumatic, particularly for children, by reducing the sensation of pain during and after the injection.