Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, has again changed his perspective on the COVID-19 herd immunity threshold in the United States, saying that his previous figures were “guesstimates.” Fauci in an interview on Sunday defended shifting his projections about herd immunity for COVID-19, the disease caused by the CCP (Chinese Communist Party) virus. “We have to realize that we have to be humble and realize what we don’t know. These are pure estimates,” Fauci told CNN’s Dana Bash. “And the calculations that I made 70, 75 percent, it’s a range. The range is going to be somewhere between 70 and 85 percent.” Herd immunity refers to when a population becomes immune to an infectious disease. Doctors say it will eventually be reached for all populations, and can be assisted by, but is not dependent upon, a vaccine. Fauci last week told the New …