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Fauci warns that US may not reach herd immunity levels even with a vaccine

Fauci warns that US may not reach herd immunity levels even with a vaccine
Posted at 6:06 AM, Jun 29, 2020
and last updated 2020-06-29 10:41:09-04

Dr. Anthony Fauci warned Sunday that even if a COVID-19 vaccine becomes available, it still may not yield herd immunity.

In an interview with the Aspen Institute on Sunday, Fauci — the U.S.'s top infectious disease expert — said he would settle for a vaccine that is between 70 and 75% effective.

"I doubt seriously that any vaccine will ever be a hundred percent protective. The best we've ever done is measles, which is 97 to 98% effective. That would be wonderful if we get there. I don't think we will," Fauci said. "I would settle for 70, 75% effective vaccine because that would bring you to that level of would-be herd immunity level."

But a CNN poll says one-third of Americans do not plan to get a vaccine if it becomes available. Fauci said Sunday that if those figures hold true and a potential COVID-19 vaccine is only 75% effective, the U.S. population would not reach the herd immunity threshold that would kill the virus.

"That's one of the reasons why we have to make sure we engage the community as we're doing now to get community people, to help us for people to understand that we are doing everything we can to show that it's safe and that it's effective," Fauci said. "And it's for the good of them as individuals and in society to take the vaccine."

Three coronavirus vaccines are expected to be studied in large-scale clinical trials in the next three months.

Herd immunity comes when a sufficient portion of a population is immune to an infectious disease. That can come either come through prior illness or vaccination, making the disease unlikely to spread further.

Coronavirus Testing Sites - Kern County

View Testing Locations Map

State-Provided Sites
  • Must have an appointment
  • Free, but if have insurance they will bill
  • No screening criteria

Kern County Fairgrounds
1142 South P Street, Building 4, Access Gate 27
Mojave Veterans Hall
15580 O Street, Mojave
Arvin Public Health
204 S Hill Street, Arvin
5th District Drive-Thru at The Prado Senior Center
2101 Ridge Road



County-Provided Sites
  • Must have an appointment
  • Free
  • No screening criteria
  • Operating with existing provider

Oildale - Good Samaritan Hospital
901 Olive Drive, Bakersfield
  • For Registration call (661) 215-7725
  • Drive-Thru Only
  • Hours: Monday - Friday 8 am - 8 pm, Saturday 8 am - 12 pm

Ridgecrest - Ridgecrest Regional Hospital
1081 N. China Lake Blvd, Ridgecrest
  • For Registration: Text the word "testing" to 833-774-4968 Or Call 866-774-9984
  • Drive-Thru Only
  • Hours: Monday - Friday 8:00 am - 10:30 am

Delano - Delano Regional Medical Center
1401 Garces Hwy, Delano
  • No Drive-Thru option
  • Hours: Monday – Friday 9 am – 5 pm

Kern River Valley - Kern Valley Hospital (Coming Soon)
6412 Laurel Ave, Mt Mesa
  • No Drive-Thru option

Tehachapi - Adventist Health Tehachapi Valley
1100 Magellan Dr 93561