Where did you get that figure?
Well, let's see.
The Mayo Clinic specifies 94% for measles. They think we need at least 70% for COVID. https://www.mayoclinic.org/diseases...th/herd-immunity-and-coronavirus/art-20486808
Wikipedia says it could be 95% or more. https://en.wikipedia.org/wiki/Herd_immunity
Johns Hopkins gives a wide range of 50 to 90%. https://www.jhsph.edu/covid-19/articles/achieving-herd-immunity-with-covid19.html
Yale says that measles requires 95%. Polio is around 80%. They think COVID is somewhere between 60% and 85%. https://www.yalemedicine.org/news/herd-immunity