Skip 
Navigation Link

1215 South Walnut Ave.
Demopolis, AL 36732 map map 

Access to Care: 1-800-239-2901

Medical Disorders
Resources
Basic InformationLookupsLatest News
What Will It Take for People to Embrace a COVID Vaccine?Smog Tied to Raised Risk for Parkinson's, Alzheimer's DiseaseWhat Will Convince Americans to Get a COVID-19 Vaccine?CDC Recommends Face Masks in All Public Transportation SettingsNewborns of Moms With COVID-19 Face Little Infection Risk: StudyAs Virtual Doctor Visits Spike, Concerns About Equity, Missed Diagnoses GrowMental Health Issues Double the Odds of Dying With COVID-19, Study FindsDuring Stress of Pandemic, Know Suicide's Warning SignsMost Newborns of COVID-19-Infected Moms Fare WellAccuracy of COVID-19 Antibody Tests Varies Widely, Study FindsGuard Yourself Against the Health Dangers of Wildfire SmokeWildfire Smoke Poses Special Threat to People With AsthmaCOVID Conflicts Are Putting Big Strains on RelationshipsEven Exercise May Not Ease Pandemic-Linked StressWest Coast Wildfires, COVID a Double Whammy to Lung HealthMasks Make Talking Even Tougher for People Who StutterWith COVID Vaccine in Works, 1 in 5 Americans Doesn't Believe in ShotsAHA News: COVID-19's Economic Fallout Expands Food Insecurity, as Groups Scramble to HelpCOVID-19 and Hurricane Season Could Be Deadly MixSprains, Strains? New Guidelines Urge OTC Painkillers, Not OpioidsAHA News: As Hurricane Season and Pandemic Collide, Here's How to Stay SafeCOVID-19 Clinical Trials Lack Diversity, Researchers SayGet Dizzy When Standing Up? It Could Be Risk Factor for DementiaLevels of Anxiety, Addiction, Suicidal Thoughts Are Soaring in the PandemicCOVID-19 Causing More Stress in America Than Other Nations: SurveyPandemic Could Complicate Hurricane Season11 States Could Face ICU Doc Shortages as Coronavirus Cases SurgeYet Another Study Finds Vaccines Are SafeIn Rush to Publish, Most COVID-19 Research Isn't Reliable, Experts SayMany U.S. Homes Too Cramped to Stop COVID-19's SpreadWith Safety Steps, Moms Unlikely to Pass COVID-19 to Newborns: StudyFace Masks Making Things Tough for the DeafU.S. Air Quality Got Better During Pandemic: StudyWill CPR Save Your Life? Study Offers a Surprising AnswerLupus Drug Prevents Low Heartbeat in High-Risk Newborns: StudyMasks, Video Calls: Pandemic Is Hampering Communication for Those With Hearing ProblemsCOVID-19 Deaths Have Already Left 1.2 Million Americans GrievingWill COVID Pandemic's Environmental Benefit Last?Exposure to Iodine in the NICU May Affect Infant Thyroid FunctionZika May Have Damaged More Infants' Brains Than ExpectedCoronavirus Ups Anxiety, Depression in the LGBTQ CommunityWill the COVID-19 Pandemic Leave a Mental Health Crisis in Its Wake?AHA News: Sadness and Isolation of Pandemic Can Make Coping With Grief HarderWildfire Smoke Causes Rapid Damage to Your Health: StudyCOVID-19 Typically Mild for Babies: StudyOne-Time Treatment Eases Parkinson's -- in MiceDrug Might Relieve Low Back Pain in Whole New WayBlood Donors Will Get Results of Coronavirus Antibody Test, Red Cross SaysAre Hardened Arteries a Risk Factor for Poor Slumber?Can Talk Therapy Heal the Body, Too?
Questions and AnswersVideosLinksBook Reviews
Related Topics

Cancer
Men's Health
Women's Health

Accuracy of COVID-19 Antibody Tests Varies Widely, Study Finds

HealthDay News
by -- Robert Preidt
Updated: Sep 24th 2020

new article illustration

THURSDAY, Sept. 24, 2020 (HealthDay News) -- Wide variation exists in the accuracy of commercial testing kits that check for antibodies against the new coronavirus, researchers say.

Antibody tests can determine whether someone has had the virus in the past. For diagnosis at a later stage of illness or in cases of delayed-onset, antibody tests could also be an important part of hospital diagnosis, the study authors said in the new report.

For the study, the researchers developed their own antibody test. They then used it to compare the performance of 10 commercial antibody test kits on an identical panel of 110 positive blood samples from hospitalized COVID-19 patients, and 50 pre-pandemic coronavirus-negative blood samples.

The findings were published online Sept. 24 in the journal PLOS Pathogens.

"We found that some of the quick single-use kits are as accurate as our sophisticated laboratory technologies," study co-author Jonathan Edgeworth said in a journal news release. He's with Guy's and St. Thomas' NHS Foundation Trust in the United Kingdom.

There was a wide range of accuracy among the tests. Specificity -- the ability to correctly identify those without the disease -- ranged from 82% to 100%. Overall sensitivity -- the ability to correctly identify those with the disease -- ranged from 61% to 87%.

All of the tests gave the best results when used 20 days or more after the start of symptoms, with most tests achieving sensitivity value greater than 95%, the researchers said.

The investigators also found that antibody levels were higher in patients with severe illness than in those with mild or no symptoms.

More information

The U.S. Centers for Disease Control and Prevention has more on COVID-19.