Definition of vaccine in English:


Pronunciation /vakˈsēn/ /vækˈsin/

Translate vaccine into Spanish


  • 1A substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute, treated to act as an antigen without inducing the disease.

    ‘there is no vaccine against the virus’
    • ‘Immunisation with the influenza vaccine is recommended for asthmatic people.’
    • ‘They have proved that a vaccine which immunises against the disease is more likely to work in humans.’
    • ‘These children show few adverse reactions to routine vaccinations, including live vaccines.’
    • ‘Malaria is still a global problem and there is no vaccine for this condition.’
    • ‘Part of the money will be used to fund vaccines and immunisation, which will save at least 5m lives by 2015.’
    • ‘The boy survived and Pasteur knew that he had found a vaccine for rabies.’
    • ‘The advent of hepatitis A virus vaccines means that protection may be provided by active immunisation.’
    • ‘He had his first seizure within hours of receiving a vaccine for diphtheria, tetanus and whooping cough.’
    • ‘In fact, the aim of the study was to test the toxicity and side effects of the vaccine.’
    • ‘Until recently, only inactivated influenza vaccine administered by injection was available for use in the United States.’
    • ‘Inactivated influenza vaccine contains noninfectious killed viruses and cannot cause influenza.’
    • ‘They have linked the MMR vaccine with autism and the development of inflammatory bowel disease in adult life.’
    • ‘The goal, however, is to develop an effective malaria vaccine.’
    • ‘Such infants should receive hepatitis B vaccine shortly after birth and complete their immunization according to a particular schedule.’
    • ‘Developing an effective vaccine against HIV has proven to be a difficult task.’
    • ‘THE MMR jab is a triple vaccine protecting against measles, mumps and rubella.’
    • ‘Unlike the early influenza vaccines, today's vaccines cause few side effects.’
    • ‘But what would happen if the vaccine only protected a person for 25 years?’
    • ‘The risk of a vaccine causing serious harm, or death, is extremely small.’
    • ‘In Africa, private philanthropy is buying vaccines for measles and hepatitis.’
    1. 1.1Computing A program designed to detect computer viruses and inactivate them.
      ‘A vaccine should consume fewer network resources than the virus against which it provides immunity.’
      • ‘I have been working on the computer vaccine for five years.’
      • ‘Do you have problem with your computer vaccine when it's service period is over?’


Late 18th century from Latin vaccinus, from vacca ‘cow’ (because of the early use of the cowpox virus against smallpox).