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

 
 

Today’s Top Stories

All News

NEW YORK, NEW YORK - MAY 02: 
  Elon Musk attends The 2022 Met Gala Celebrating "In America: An Ant...
Ramishah Maruf, CNN

Elon Musk speaks out on ‘Twitter Files’ release detailing platform’s inner workings

Originally Published: 04 DEC 22 09:38 ET     (CNN) — Twitter owner Elon Musk spoke out on Saturday evening about the so-called “Twitter Files,” a long tweet thread posted by journalist Matt Taibbi, who had been provided with details about behind-the-scenes discussions on Twitter’s content moderation decision-making, including the call to suppress a 2020 New York […]
19 hours ago
bomb threat Utah Tech...
Devin Oldroyd

Utah Tech student dies after falling from fifth-story balcony

A Utah Tech University student is dead after falling from a fifth-story balcony early Sunday morning. The death appears to be accidental.
19 hours ago
Photo of a SLCPD cruiser...
Devin Oldroyd

SLCPD arrest suspect following “highly coordinated” pursuit

SALT LAKE CITY, Utah — Following a highly coordinated and long search, the Salt Lake City Police Department safely arrested a 22-year-old suspect. According to a press release, Bhode Smith was booked into the Salt Lake County Metro Jail on charges of Failure to Respond to an Officer’s Signal to Stop, Failure to Stop at […]
19 hours ago
Hari Bastakoti shovels a sidewalk following a snowstorm in Salt Lake City on Tuesday, Nov. 29, 2022...
Chandler Holt

After a cold November, Utah prepares for another storm

After a colder November than years past, a cold front (potentially bringing storm conditions) is on the horizon for Utah.
19 hours ago
Image of the crash that killed two people in West Valley City on 12/3/22 (Photo courtesy of Doris S...
Chandler Holt

2 dead after crash into parked box truck

Two people died following a crash into a parked box truck in West Valley City on Saturday. 
19 hours ago
(Photo courtesy of Snowbird Ski Resort)...
Chandler Holt

Avalanche at Snowbird caused by skier, no injuries

On Saturday, an avalanche roared down the slopes at Snowbird Ski Resort. Several people were caught and carried by the avalanche, but no one was buried.
19 hours ago

Sponsored Articles

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
christmas decorations candles in glass jars with fir on a old wooden table...
Western Nut Company

12 Mason Jar Gift Ideas for the 12 Days of Christmas [with recipes!]

There are so many clever mason jar gift ideas to give something thoughtful to your neighbors or friends. Read our 12 ideas to make your own!
wide shot of Bear Lake with a person on a stand up paddle board...

Pack your bags! Extended stays at Bear Lake await you

Work from here! Read our tips to prepare for your extended stay, whether at Bear Lake or somewhere else nearby.
young boy with hearing aid...
Sorenson

Accommodations for students who are deaf and hard of hearing

These different types of accommodations for students who are deaf and hard of hearing can help them succeed in school.
How will a vaccine help with COVID-19 herd immunity?