Earlier this year, researchers said Dallas County would reach herd immunity by the summer. But with the spread of the delta variant of COVID-19, that timeline has changed.
Herd immunity is achieved when enough people are protected from COVID-19, either by prior infection or vaccination, that the virus stops spreading.
Watch NBC 5 free wherever you are
WATCH HEREEarlier this summer, Dallas County researchers said the county had reached herd immunity -- but that was before the delta variant began to spread.
Now, those researchers say the county will reach herd immunity when 90% of the population has COVID-19 antibodies.
Get top local stories in DFW delivered to you every morning with NBC DFW's News Headlines newsletter.
SIGN UP It's unknown how much antibody protection people with asymptomatic or mild COVID-19 have after they recover.
