单词	community immunity
释义	community immunity noun : herd immunity Encouraging our families, friends and neighbors to get vaccinated adds layers of protection and helps us create community immunity. Larry Antonucci There is a level of vaccination that is needed to protect a community from an outbreak of disease. This is called "herd immunity" and sometimes, "community immunity." Erica Parker Word History First Known Use 1915, in the meaning defined above
随便看	salivation salivations salivator salivators salivous salix salixes Salk Salk vaccine sall sall yellow sallades salle salle à manger sallee sallee-rover sallee-rovers salleeman salleemen sallenders sallet sallets salley sallied sallied (forth)

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