We regularly answer frequently asked questions about life during the coronavirus crisis. If you have a question you'd like us to consider for a future post, email us at goatsandsoda@npr.org with the subject line: "Weekly Coronavirus Questions." See an archive of our FAQs here.
Many of us are returning from spring break travel and holiday celebrations with loved ones just as cases in parts of the United States and in some other countries are starting to tick back up.
Testing for COVID is as critical now as it was in earlier stages of the pandemic in order to understand where cases are rising and so that you can seek treatment.
So you may be wondering: When do I need to test now? And can I trust a first test result?
First off: If you develop COVID-like symptoms, test as soon as possible.
And let's assume you're going to self-test because you don't have easy access to a facility that offers PCR tests and/or your insurance doesn't cover it and/or you don't want to wait extra time for results rather than an instant read off a do-it-yourself antigen test.
So you take that home test... and it's negative. Are you in the clear? Maybe, but not definitively. Our experts suggest testing again after a couple of days.
Your body's response to SARS-CoV-2 infection depends on your level of immunity from previous encounters with the virus and from vaccines and boosters.
So it's possible that the negative result is correct and you simply didn't get infected.
Or you might not have enough "viral load" in the early stages of being infected to test positive. That can happen if you have some degree of immunity from a prior case or a vaccination but you get infected anyway (see: Nancy Pelosi).
That's why experts recommend testing at least twice. Test number one would come when you first have concerns that you are infected based on symptoms.
And if you've been exposed to someone with COVID or were in a higher-risk situation (traveling, karaoke party, Gridiron dinner) and then plan to be around an older relative or a child too young to be vaccinated or someone who's immune-compromised?
"If you are going to be around the vulnerable population that can't be protected from the disease and, unfortunately, we have a lot of people that fall into that category then you should do everything in your power to try and make sure you don't have the virus," said Omai Garner, director of clinical microbiology in the UCLA Health System.
You might be tempted to test right away to ease your anxiety. But the recommendation from the U.S. Centers for Disease Control and Prevention is to wait five days after a possible exposure.
It takes a little while for the virus to build up in your body. Testing too soon might give you a false negative.
"You can't take a pregnancy test the day after intercourse to see if you're pregnant, right?" Bergstrom said. The rapid test for COVID is "an excellent test it just has to be used properly and at the right time."
And there's a reason tests come in pairs of two, Garner said. "You need to use them in the pair that they come in, and have multiple days in between, in order to be sure."
And for that second test, waiting a few hours doesn't count because your viral load still might not be high enough to detect. Testing experts suggest an interval of 48 hours before a second test.
Now if you do go for a PCR test, you won't have quite the same concerns. That's because for rapid home tests to turn positive, you need a higher viral load: Those antigen tests don't amplify the sample as PCR tests do.
For those with prior immunity to the virus, "most people feel that a PCR is positive 24 hours sooner than the rapid," says Ida Bergstrom, an internal medicine physician at a medical and travel clinic that conducts testing in Washington, D.C.t.
If you've developed symptoms after close, significant contact, you might consider getting a PCR even after negative rapid tests.
"If your husband is positive, and you develop symptoms, and you have a negative rapid and then the subsequent day you have a negative rapid I would still personally do a PCR before I called myself in the clear," Bergstrom says.
And should I contact my doctor if I have a positive test?
YES. There are a few reasons why.
If you are at risk of severe outcomes because of your age or preexisting conditions, you should try to get highly effective antivirals or monoclonal antibodies as soon as you test positive. The faster you can get the treatments, the better they work but they can only be prescribed after a positive test.
Even if you're not at high risk, you should let your doctor know of your positive test so that they can help you monitor your symptoms and have a more complete record of your health history.
This is a really important step, because you could go on to develop long COVID even after a mild illness, even if you were previously healthy. Between 10 to 50% of people who recover from COVID have long-term symptoms.
"If your symptoms linger or if there's any question with disability or anything in the future, it's nice that there's a trail," Bergstrom said.
Insurance companies may not cover treatments for long COVID if you don't have documented evidence of a positive test, and you may not be able to apply for disability without it.
It's also a great idea to report your home test results to your local health department, if that's an option, so that they can track local cases. Some states and cities also offer services like deferred rent or mortgage assistance for those who test positive.
Melody Schreiber (@m_scribe) is a journalist and the editor of What We Didn't Expect: Personal Stories About Premature Birth.
Excerpt from:
- 2024 CDC COVID-19 guidelines: Isolation, masks, what you should know - The Arizona Republic - February 29th, 2024 [February 29th, 2024]
- Long Covid and Impaired Cognition More Evidence and More Work to Do | NEJM - nejm.org - February 29th, 2024 [February 29th, 2024]
- Prospective Memory Assessment before and after Covid-19 | NEJM - nejm.org - February 29th, 2024 [February 29th, 2024]
- A pandemic that won't go away as COVID enters its 5th year, NZ needs a realistic strategy - The Conversation - February 29th, 2024 [February 29th, 2024]
- Older US adults should get another COVID-19 shot, advisers say - Detroit News - February 29th, 2024 [February 29th, 2024]
- Vaping increases susceptibility to COVID-19 infection, study finds - News-Medical.Net - February 29th, 2024 [February 29th, 2024]
- Older U.S. adults should get another covid-19 shot, advisers say - TribLIVE - February 29th, 2024 [February 29th, 2024]
- Vapers More Susceptible to COVID-19 Infection Than Tobacco Smokers, Reveals Study | Weather.com - The Weather Channel - February 29th, 2024 [February 29th, 2024]
- How we met: She was in the next hospital bed and I loved her accent - The Guardian - February 29th, 2024 [February 29th, 2024]
- Fleet To Hit Record Size In 2024 But Still Suffering Covid Hangover - Forbes - February 29th, 2024 [February 29th, 2024]
- How vaccine hesitancy is contributing to rising rates of measles and COVID - PBS NewsHour - February 29th, 2024 [February 29th, 2024]
- How did COVID-19 impact cancer incidence trends in the US? - News-Medical.Net - February 29th, 2024 [February 29th, 2024]
- CT-based Assessment at 6-Month Follow-up of COVID-19 Pneumonia patients in China | Scientific Reports - Nature.com - February 29th, 2024 [February 29th, 2024]
- Covid in 2024: What to Know About Guidelines, Symptoms and Vaccines - WSJ - The Wall Street Journal - February 29th, 2024 [February 29th, 2024]
- Unlocking coronavirus structure through M protein research - News-Medical.Net - February 29th, 2024 [February 29th, 2024]
- SARS-CoV-2 fragments may cause problems after infection - National Institutes of Health (NIH) (.gov) - February 29th, 2024 [February 29th, 2024]
- People 65 and up should now get another COVID-19 vaccine, CDC recommends - cleveland.com - February 29th, 2024 [February 29th, 2024]
- Welcome to the 2024 CFA Annual Report | Covid-19 | news-journal.com - Longview News-Journal - February 29th, 2024 [February 29th, 2024]
- Exploring the reported adverse effects of COVID-19 vaccines among vaccinated Arab populations: a multi-national ... - Nature.com - February 29th, 2024 [February 29th, 2024]
- R.I. COVID-19 cases increased by 337 last week, with 2 deaths - Providence Business News - February 29th, 2024 [February 29th, 2024]
- Older US adults should get another COVID-19 shot, advisers say - NBC Bay Area - February 29th, 2024 [February 29th, 2024]
- Cognitive Deficits Seen in COVID-19 Patients Regardless of Symptom Duration - HealthDay - February 29th, 2024 [February 29th, 2024]
- CDC recommends seniors get another Covid-19 shot - Baltimore Sun - February 29th, 2024 [February 29th, 2024]
- Odds of Severe COVID-19 High for Hematologic Cancer Patients During Pandemic - HealthDay - February 29th, 2024 [February 29th, 2024]
- COVID-19 may have small but lasting effects on cognition and memory | Imperial News - Imperial College London - February 29th, 2024 [February 29th, 2024]
- More free home COVID-19 tests available from US government - WCVB Boston - November 20th, 2023 [November 20th, 2023]
- Seniors made up 63 percent of covid hospitalizations earlier this year - The Washington Post - November 20th, 2023 [November 20th, 2023]
- Fifth Covid-19 wave sees biggest bump in virus detection since ... - New Zealand Herald - November 20th, 2023 [November 20th, 2023]
- KFF COVID-19 Vaccine Monitor November 2023: With COVID ... - KFF - November 20th, 2023 [November 20th, 2023]
- What to Know About the New Dominant Covid Variant - The New York Times - August 12th, 2023 [August 12th, 2023]
- Should You Get Another Covid Booster Now, or Wait Until the Fall? - The New York Times - August 12th, 2023 [August 12th, 2023]
- A 'mini cyclone' helps detect coronavirus in the air - Science News Explores - August 12th, 2023 [August 12th, 2023]
- Infection prevention and control in the context of coronavirus ... - World Health Organization - August 12th, 2023 [August 12th, 2023]
- Serum ferritin level during hospitalization is associated with Brain ... - Nature.com - August 12th, 2023 [August 12th, 2023]
- Rhode Island Man Sentenced to Three Years in Prison for Theft and ... - Department of Justice - August 12th, 2023 [August 12th, 2023]
- Posts Exaggerate Significance of Swiss Study on Heart Risk and ... - FactCheck.org - August 12th, 2023 [August 12th, 2023]
- Wenstrup Presses Department of Education for Answers on Misuse ... - House Committee on Oversight and Reform | - August 12th, 2023 [August 12th, 2023]
- Biden Administration Fails to Share Intel on COVID-19 Origins, but Independent Evidence Is Piling Up - Heritage.org - June 24th, 2023 [June 24th, 2023]
- Do I need a booster vaccine if I recently had COVID? What if I'm not sure what I had? - The Conversation - June 24th, 2023 [June 24th, 2023]
- Psychics, wrestlers and churches: How online shopping and Covid changed mall tenants - Buffalo News - June 24th, 2023 [June 24th, 2023]
- Report: Incarcerated populations up 4% post-COVID - CorrectionsOne - June 24th, 2023 [June 24th, 2023]
- The National Average for Gross Revenue at ECP Locations Decreased for the Week of June 12 18, Jobson's Latest ... - Vision Monday - June 24th, 2023 [June 24th, 2023]
- ODNI Releases Report on the Potential Links Between the Wuhan ... - Office of the Director of National Intelligence - June 24th, 2023 [June 24th, 2023]
- U.S. Intelligence Agencies May Never Find Covid's Origins, Officials ... - The New York Times - June 24th, 2023 [June 24th, 2023]
- Covid-19 likely came from lab leak, says news report citing US energy ... - March 4th, 2023 [March 4th, 2023]
- Classified Energy Department report finds lab leak likely cause of ... - March 4th, 2023 [March 4th, 2023]
- Mayor Kirk Watson tests positive for COVID-19 - KEYE TV CBS Austin - February 5th, 2023 [February 5th, 2023]
- Biden's plan for ending the emergency declaration for COVID-19 signals a pivotal point in the pandemic 4 questions answered - The Conversation... - February 5th, 2023 [February 5th, 2023]
- Study finds one habit can significantly lower your odds of getting sick from COVID-19 - KATU - February 5th, 2023 [February 5th, 2023]
- How will life change once the COVID-19 emergency ends? - KFOX El Paso - February 5th, 2023 [February 5th, 2023]
- Shipping Corporation of India and Seven Islands Shipping re-join membership of INSA - ETInfra.com - January 30th, 2023 [January 30th, 2023]
- COVID-19 Response | United Nations - December 28th, 2022 [December 28th, 2022]
- Top German virologist says COVID-19 pandemic is over - Hindustan Times - December 28th, 2022 [December 28th, 2022]
- China says impossible to track COVID spread as virus surges - Al Jazeera English - December 14th, 2022 [December 14th, 2022]
- What are the most common COVID symptoms now? Its no longer fever, loss of taste - AL.com - December 14th, 2022 [December 14th, 2022]
- Entropy and life - Wikipedia - November 27th, 2022 [November 27th, 2022]
- Negentropy - Wikipedia - November 27th, 2022 [November 27th, 2022]
- Coronavirus: OC reported 1,602 new cases and six more deaths over the past week, as of Nov. 17 - OCRegister - November 19th, 2022 [November 19th, 2022]
- How COVID-19 damages lungs: The virus attacks mitochondria, continuing an ancient battle that began in the primordial soup - The Conversation - October 30th, 2022 [October 30th, 2022]
- How to save this winter on heating costs - WKYC.com - October 23rd, 2022 [October 23rd, 2022]
- 'Fonseca' book review: The Goan artist's biography misses the art of the matter - The New Indian Express - October 23rd, 2022 [October 23rd, 2022]
- Researchers' tests of lab-made version of Covid virus draw scrutiny - STAT - October 21st, 2022 [October 21st, 2022]
- Coronavirus: Orange County reported 1,427 more cases and seven more deaths in the past week as of Oct. 20 - OCRegister - October 21st, 2022 [October 21st, 2022]
- 3 Illinois Counties at High Community Level for COVID-19 as 1 Million Bivalent Booster Shots Have Been Administered - NBC Chicago - October 21st, 2022 [October 21st, 2022]
- What Is Coronavirus? | Johns Hopkins Medicine - October 17th, 2022 [October 17th, 2022]
- Gaston County reported 177 additional COVID-19 cases this week - Gaston Gazette - October 17th, 2022 [October 17th, 2022]
- Coronavirus Roundup: The Biden Administration Renews the Public Health Emergency for COVID-19 - GovExec.com - October 17th, 2022 [October 17th, 2022]
- Circulation of Public Warning Alert on COVID-19 vaccines fraudulently using PAHO's name and logo - World - ReliefWeb - October 17th, 2022 [October 17th, 2022]
- Time to Get Your Flu Shot and Your COVID-19 Booster Too - Health.mil - October 17th, 2022 [October 17th, 2022]
- Evasive COVID-19 subvariants that you dont know about are spreading fast - Poynter - October 17th, 2022 [October 17th, 2022]
- Deer and mink can harbor Covid-19: Why animal virologists say we need to worry - Inverse - October 17th, 2022 [October 17th, 2022]
- Europe likely entering another COVID wave, says WHO and ECDC - Reuters - October 17th, 2022 [October 17th, 2022]
- Without a nasal vaccine, the U.S. edge in fighting Covid is on the line - POLITICO - October 17th, 2022 [October 17th, 2022]
- COVID-19 Daily Update 10-17-2022 - West Virginia Department of Health and Human Resources - October 17th, 2022 [October 17th, 2022]
- Coronavirus: Government seeking to extend powers behind COVID restrictions until 2025 - Newshub - October 17th, 2022 [October 17th, 2022]
- Shocking: EcoHealth Alliance receives another round of funding for coronavirus bat research in Asia - The Center Square - October 17th, 2022 [October 17th, 2022]
- Opportunities in Health Education in the Post-COVID-19 Era: Transforming Viral to Vital - Cureus - October 17th, 2022 [October 17th, 2022]
- Fauci says COVID-19 was politicized by triple whammy of outbreak, division and 2020 election - WJTV - October 17th, 2022 [October 17th, 2022]
- How long does immunity from the new COVID bivalent boosters last 'in the real world'? - San Francisco Chronicle - October 17th, 2022 [October 17th, 2022]
- Respiratory illnesses have spiked among children. Here's what parents need to know. - Yahoo News - October 17th, 2022 [October 17th, 2022]