noun Download 🔗Share The indirect protection against the spread of a contagious disease in a given population caused by the immunity of a significant proportion of the population to that particular disease; the immunity may have been obtained through having survived the infection or through vaccination. Examples : "Vaccination programs aim to establish herd immunities so that even those who cannot be vaccinated are protected from diseases like measles. " medicine virus disease biology organism Chat with AIVocabulary GamePractice Reading