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This principle is called herd immunity.
For the vulnerable in our society, herd immunity is their best protection.
Well, it's called herd immunity.
You may have heard about herd immunity.
When enough people get immunized, vaccines produce herd immunity.
When enough people get immunized, vaccines produce "herd immunity": when someone is sick,
This is known as herd immunity.
Herd immunity means that as long as a certain proportion of the population is vaccinated, the disease won't be able to transmit within that population.
Today we're going to talk about herd immunity and how to stop an epidemic.
Today we're going to talk about herd immunity and how to stop an epidemic.
It's a highly contagious disease, and for that reason, it needs a very high rate of immunity, community immunity, herd immunity.
This is how herd immunity is achieved.
If a large percentage chose not to get vaccinated, then we would never get herd immunity.