ALL NEWS

How will a vaccine help with COVID-19 herd immunity?

Dec 3, 2020, 7:28 AM | Updated: 10:02 am
Utah children and COVID-19 kids spread COVID-19 herd immunity...
(PHOTO: AP Photo/LM Otero)
(PHOTO: AP Photo/LM Otero)

EDITORIAL NOTE: ‘How will a vaccine help with COVID-19 herd immunity?’ is the fourth part of our four-part series, ‘The Vaccines: Hope on the Horizon.’ Each day, KSL will break down a different aspect of COVID-19 vaccine development and distribution. Listen to Utah’s Morning News at 7:45 a.m. and to Jeff Caplan’s Afternoon News at 4:45 p.m. every day this week for the latest. 

 

SALT LAKE CITY – Herd immunity happens when a large percentage of people develop immunity to a disease either through vaccination or infection. 

Dr. Shankar Swaminathan, the Chief of the Infectious Disease Division at University of Utah Health, asks people to imagine that a person with COVID-19 typically infects two people. 

“Let’s say that half the people are immunized. So, now, if you have it and you run into two people, on average you’re going to infect one person instead of two,” Swaminathan says. 

Although approval of a COVID-19 vaccine may be just around the corner, it’s unclear how many people would need a shot to achieve herd immunity in Utah. 

However, Dr. Swaminathan says the more people who are immunized, the greater the chances of achieving herd immunity. 

“Let’s say two out of three people get vaccinated. Now…you’re able to spread it to less than one person,” Swaminathan says. “On average, the disease is going to start dying out.”  

The best guesses range anywhere from 70% to above 90% immunity to get to herd immunity.

Don’t try and catch COVID-19 to speed up herd immunity

Dr. Tamara Sheffield, the Medical Director of Community Health and Prevention at Intermountain Healthcare, says people who have recovered from COVID-19 do have immunity to it. 

“Those who have the severest disease tend to also have the greatest amount of immune protection. But we don’t know how long that will last,” Sheffield says.  

Those are some of the reasons she asks people not to try and catch COVID-19. She also reminds people that they cannot know for sure how their bodies will react to the virus. 

It will take time

Dr. Mark Oliver, the Head of Infectious Disease at St, Mark’s Hospital in Salt Lake City, agrees with following public health guidelines. 

However, he also believes the immunity COVID-19 patients acquire will play a role in achieving herd immunity. 

“We are encouraged that a combination of vaccination plus ongoing infection in the community will get us to that magic percentage that we call herd immunity,” Oliver says. 

Especially because we do not know enough about the vaccine yet.  

“We really won’t know for a year or more if the vaccine gives better protection than native infection. Also, how long lasting the immune response will be from the vaccine is still a big question mark. Is this a vaccine [where] you’re going to get two shots and be protected with 95% certainty for the rest of your life? Or is this a vaccine that we’re going to have to get another booster at six months or a year or two years?” Oliver says.   

But Dr. Oliver also says if a vaccine is safe and effective, getting one will help protect people who cannot take it for health or other reasons. 

Dr. Sheffield says vaccines also tend to be more effective than any acquired immunity. 

“Vaccines…tend to provide a fairly consistent level [of immunity], and sometimes a higher level, than having had a disease or being exposed to a disease. We will also, though, have to watch over time to see how long that protection lasts,” Sheffield says.         

 


How To Prevent the Spread of COVID-19 Coronavirus

COVID-19 coronaviruses transmitted from person to person. It is a virus that is similar to the common cold and the flu. So, to prevent it from spreading:

  • Wash hands frequently and thoroughly, with soap and water, for at least 20 seconds.
  • Wear a mask.
  • Don’t touch your face.
  • Keep children and those with compromised immune systems away from someone who is coughing or sneezing (in this instance, at least six feet)
  • If there is an outbreak near you, practice social distancing (stay at home, instead of going to the movies, sports events, or other activities.)
  • Get a flu shot.

Local resources

KSL Coronavirus Q&A

Utah’s Coronavirus Information

Utah State Board of Education

Utah Hospital Association

The Church of Jesus Christ of Latter-day Saints

Utah Coronavirus Information Line – 1-800-456-7707

National Resources

Centers for Disease Control and Prevention

Commonly asked questions, World Health Organization

Cases in the United States

 
 

We want to hear from you.

Have a story idea or tip? Send it to the KSL NewsRadio team here.

Today’s Top Stories

All News

Exterior rendering of the Helena Montana Temple. Photo credit: The Church of Jesus Christ of Latter...
Mark Jones

Open house dates for Helena Montana Temple announced

The Helena Montana Temple will be dedicated on Sunday, June 18, The First Presidency of The Church of Jesus Christ of Latter-day Saints announced Monday.
1 day ago
Police siren pictured, eagle mountain police in a standoff right now...
Mark Jones

Boy injured after falling from slide at Rose Springs Elementary School

The Tooele County Sheriff's Office says an 8-year-old boy is in critical but stable condition after falling off a slide at school Monday morning.
1 day ago
Salt Lake City Police arrested a 31-year-old man Monday morning after he allegedly threatened anoth...
Mark Jones

Salt Lake City police arrest man after road rage incident, involving a gun

A 31-year-old man was arrested early Monday morning following a road rage incident. Police say the suspect allegedly threatened another person with a gun.
1 day ago
The Utah House has advanced the bill that bans transgender-related surgeries on minors and pauses t...
Aimee Cobabe

Equality Utah supports bill clarifying rules for therapists when it comes to conversion therapy for minors

Equality Utah is supporting a bill adjusting rules for therapists when it comes to conversion therapy for minors.
1 day ago
Water flows through Mill Creek as snow blankets Millcreek Canyon on Tuesday, Jan. 3, 2023. Utah has...
Hugo Rikard-Bell

Utah hasn’t had this much snowfall since 2011, according to NWS

The National Weather Service says Utah hasn't seen this kind of snowfall since 2011. The state is currently at 167% of median for Utah.
1 day ago
Tens of thousands of dead birds are washing up on the shores of the Great Salt Lake. Wildlife exper...
Aimee Cobabe

Thousands of dead birds are washing ashore at the Great Salt Lake

Tens of thousands of dead birds are washing up on the shores of the Great Salt Lake. Wildlife experts say it's all very normal.
1 day ago

Sponsored Articles

Banner with Cervical Cancer Awareness Realistic Ribbon...
Intermountain Health

Five Common Causes of Cervical Cancer – and What You Can Do to Lower Your Risk

January is National Cervical Cancer Awareness month and cancer experts at Intermountain Health are working to educate women about cervical cancer, the tests that can warn women about potential cancer, and the importance of vaccination.
Kid holding a cisco fish at winterfest...
Bear Lake Convention and Visitors Bureau

Get Ready for Fun at the 2023 Bear Lake Monster Winterfest

The Bear Lake Monster Winterfest is an annual weekend event jam-packed full of fun activities the whole family can enjoy. This year the event will be held from January 27-29 at the Utah Bear Lake State Park Marina and Sunrise Resort and Event Center in Garden City, Utah. 
happy friends with sparklers at christmas dinner...
Macey's

15 Easy Christmas Dinner Ideas

We’ve scoured the web for you and narrowed down a few of our favorite Christmas dinner ideas to make your planning easy. Choose from the dishes we’ve highlighted to plan your meal or start brainstorming your own meal plan a couple of weeks before to make sure you have time to shop and prepare.
Spicy Homemade Loaded Taters Tots...
Macey's

5 Game Day Snacks for the Whole Family (with recipes!)

Try these game day snacks to make watching football at home with your family feel like a special occasion. 
Happy joyful smiling casual satisfied woman learning and communicates in sign language online using...
Sorenson

The Best Tools for Deaf and Hard-of-Hearing Workplace Success

Here are some of the best resources to make your workplace work better for Deaf and hard-of-hearing employees.
Team supporters celebrating at a tailgate party...
Macey's

8 Delicious Tailgate Foods That Require Zero Prep Work

In a hurry? These 8 tailgate foods take zero prep work, so you can fuel up and get back to what matters most: getting hyped for your favorite
How will a vaccine help with COVID-19 herd immunity?