1 in 10 county residents may have had COVID-19, county study finds

The Maricopa County Department of Public Health announced Nov. 16 that an estimated 10.7% of county residents have detectable antibodies for COVID-19. (Courtesy Adobe Stock)
The Maricopa County Department of Public Health announced Nov. 16 that an estimated 10.7% of county residents have detectable antibodies for COVID-19. (Courtesy Adobe Stock)

The Maricopa County Department of Public Health announced Nov. 16 that an estimated 10.7% of county residents have detectable antibodies for COVID-19. (Courtesy Adobe Stock)

The Maricopa County Department of Public Health announced Nov. 16 that an estimated 10.7% of county residents have detectable antibodies for COVID-19—translating to roughly 470,000 people in Maricopa County who have likely been infected with the virus since the pandemic began.

The results stem from an 11-day study conducted in mid-September by the Maricopa County Department of Public Health in partnership with Arizona State University and Mayo Clinic thtat collected specimens from 260 participants in 169 households randomly selected from across the county to test for antibodies for the virus that causes COVID-19, according to a news release from the county.

"MCDPH and ASU worked with the Centers for Disease Control and Prevention (CDC) to implement a method that samples a small number of households in randomly selected communities that, when combined, represent all of Maricopa County," read the release. "The CDC gave MCDPH and ASU a list of 29 communities that are representative of the entire county."

Key findings from the serosurvey, according to the news release, include:

  • For every case reported to the public health department, there were three to four cases that were not reported up to mid-September, when the serosurvey was conducted.

  • The number of true infections is likely far higher than the number of people who are being tested for COVID-19.

  • There was a higher seroprevalence within households than across individuals, which supports evidence that infections cluster within households.


"We know that sustained close contact drives the majority of infections," said Marcy Flanagan, the executive director of the public health department, in a news release. "The serosurvey findings emphasize the importance of separating household members once someone is diagnosed with COVID-19 and in isolation at home."

Flanagan said in the news release that the percentage of the Maricopa County population with antibodies is "far less than is needed to reach herd immunity," which is the point at which the virus cannot spread effectively.


“We estimate that somewhere between 40% and 80% of the population would need to be vaccinated with the COVID-19 vaccine to reach herd immunity,” Flanagan said. “It’s critical that we all wear face masks correctly and consistently, physically distance from others, wash our hands and avoid large groups of people to help slow the spread of COVID-19.”


MOST RECENT

The city of Chandler headquarters is in downtown Chandler. (Alexa D'Angelo/Community Impact Newspaper)
Chandler ends emergency declaration issued last March due to COVID-19

Chandler Mayor Kevin Hartke announced May 13 that he is rescinding the proclamation declaring the existence of a local emergency in Chandler issued March 19, 2020, due to the ongoing COVID-19 pandemic.

Doug Ducey
Ducey unveils program to encourage individuals to return to work

Gov. Doug Ducey announced May 13 a three-part “Arizona Back to Work” program to incentivize residents to get off unemployment benefits and fill one of the state’s 160,000 to 180,000 open jobs.

masks
CDC ends all mask requirements for fully vaccinated people

The guidance states fully vaccinated people do not need to wear masks indoors or outdoors.

Doug Ducey
Gov. Ducey signs bill to trim early voter roll

Arizona Gov. Doug Ducey on May 11 signed into law Senate Bill 1485, which will purge the permanent early voter rolls of anyone who has not voted by mail in the previous two election cycles.

Denise McCreery, d'vine Gourmet owner, first began her business as a means to rid her home of half-consumed wine bottles her husband, a wine distributor, brought home. (Alexa D'Angelo/Community Impact Newspaper)
Chandler's d'Vine Gourmet set to relocate to downtown this fall

Downtown Chandler will get a new business this fall when d'Vine Gourmet relocates its store to the space occupied by Sibley's West.

Residents will have until May 2023 to obtain a Real ID. (Courtesy Adobe Stock)
US Department of Homeland Security extends Real ID deadline until 2023

Drivers will have until May 2023 to get the Real ID, which will be required for adults boarding a U.S. commercial flight.

COVID-19 vaccine
Arizona children ages 12-15 can be vaccinated starting May 13

Arizona Department of Health Services officials said they are ready to administer vaccines to the state’s 400,000 children in that age group at state-run vaccination sites in the Phoenix metropolitan area, Tucson, Yuma and Flagstaff.

Susan Bailey was elected president of the American Medical Association in June 2020. (Courtesy American Medical Association)
'I am convinced we will beat COVID': American Medical Association President Susan Bailey discusses vaccine successes, myths, challenges

Bailey was elected president of the American Medical Association in June 2020. Much of the organization's focus during that time has been on vaccine transparency and distribution.

Several new businesses will be opening in Chandler in the next few months. (Community Impact Newspaper staff)
Conveyor belt sushi, wine bar and more: 5 businesses coming soon to Chandler

Several businesses will open in Chandler in the coming months including 99 Ranch Market, a revolving sushi bar and others.

Chandler USD headquarters. (Alexa D'Angelo/Community Impact Newspaper)
Chandler USD governing board to discuss COVID-19 mitigation plan for upcoming year at May 12 meeting

The Chandler USD governing board will discuss the district's potential COVID-19 mitigation plan for the 2021-22 school year during a meeting Wednesday, May 12, according to the board agenda.

Here are the coronavirus hospitalization data updates to know across Arizona. (Community Impact staff)
ADHS: Emergency Department visits for COVID-19 symptoms spike May 12

Take a look at the hospitalization data across Arizona.

Randy Duren co-owns Hair of the Dog with his wife, Marleen. (Tom Blodgett/Community Impact Newspaper)
A pet-friendly bar opens in Gilbert; a 99 Ranch Market will anchor a Chandler shopping center and more top news from the Phoenix area

Read the most popular business and community news from the past week from the Phoenix area.