As confirmed cases of coronavirus continue to climb in the U.S. and around the world, questions about the virus have grown too, including how to know whether you have it or not and where and how to get tested.
Unlike other diseases with distinct symptoms, novel coronavirus, formally known as COVID-19, has signs that mimic a cold or flu, including fever and cough, but also include shortness of breath. Symptoms range from mild in the majority of cases to severe, requiring hospitalization and critical care.
Some countries have been more aggressive than others in testing, like South Korea, which deployed tens of thousands of tests early on in the outbreak, compared to the United States, which initially only tested those with travel contacts.
The number of people tested in the U.S. has grown since then, but experts say the government should be testing more. Dr. Anthony Fauci, the head of the National Institute of Allergy and Infectious Disease, called the testing system that was in place “a failing.”
Here’s what you need to know about testing:
Do I need a test?
Despite President trump saying last week that “anyone who wants a test can get a test,” officials say that getting everyone tested is a long-term goal. Currently testing is limited and should be left to those who really need it, public health officials told ABC News.
As of March 13, the Centers for Disease Control and Prevention (CDC) labs have tested some 3,900 specimens while U.S. public health labs have tested more than 12,000 specimens. Data collected over the last week are not completed. More than 81 public health labs are online in all 50 states and conducting testing, according to the CDC.
Generally, the CDC says the decision should be left up to your doctor.
“Clinicians should use their judgment to determine if a patient has signs and symptoms compatible with COVID-19 and whether the patient should be tested,” according to the CDC.
Those who should be prioritized include: 1) hospitalized patients with symptoms compatible with COVID-19; 2) symptomatic older adults (over 65) or those with underlying health conditions; 3) health personnel who had contact with a suspected or confirmed COVID-19 patient with 14 days or travel to an affected region, the CDC said in a March 8 release.
The CDC said doctors should encourage “should be encouraged to stay home and contact their healthcare provider by phone for guidance about clinical management.” “Patients who have severe symptoms, such as difficulty breathing, should seek care immediately. Older patients and individuals who have underlying medical conditions or are immunocompromised should contact their physician early in the course of even mild illness,” the CDC said.
Public health officials told ABC News that the push for testing has become a distraction and likened it to frenzy-buying of medical masks, tying up valuable resources.
Many COVID-19 symptoms are similar to the common cold and influenza, but only testing can confirm an infection. This is different, for instance, from China, which for a period of time included clinical diagnoses in its count in addition to lab-confirmed tests. Scientists told ABC News that changing that methodology could complicate tracking the disease.
Public health officials told ABC News that testing is necessary mainly to track the spread of disease and insure proper treatment and isolation for those infected, especially since COVID-19 is an influenza-like illness.
How does it work?
On Friday, the White House announced a new testing protocol where prospective patients are directed to a screening website. If they have symptoms, they will be directed to a mobile testing site, much like those in Denver in elsewhere. Those tests will be sent to labs where they will be analyzed, Dr. Debbie Birx, the White House coronavirus response coordinator.
But public health officials told ABC News that it is not like taking a pregnancy test or some other common medical test. Instead it is more like the test for Ebola, they said, providing a set of data as opposed to a yes or no answer, the officials said.
Under the current protocol, test administered by hospitals or clinics typically involve, according to the officials:
— Two sets of Personal Protective Equipment (PPE)
— 20 to 25 minutes to put on and take off PPE.
— Transporting the sample to the lab — a process called real-time PCR (Polymerase Chain Reaction)
— A certified epidemiologist confirms every positive test.
— The results are entered into the system.
Any test conducted on someone under quarantine requires even more resources and protection, the officials told ABC News.
Under the new protocol, using the drive-thru sites, “the goal is for individuals to be able to drive up and be swabbed without having to leave your car,” president trump said on March 13. The test uses a nasal swab, Birx said.
How long will the results take?
It depends. Results had been taking a few days, but Birx said that the new testing procedure would take 24 hours from start to finish, Birx said.
Can I test negative and later test positive?
Under the CDC-developed test, a negative result means the virus was not detected in the patient’s sample, which is possible in the early stages of infection.
“For COVID-19, a negative test result for a sample collected while a person has symptoms likely means that the COVID-19 virus is not causing their current illness,” the CDC said.
What if I test positive?
As ABC News’ Chief Medical Correspondent Dr. Jen Ashton and other medical experts have pointed out, there is no treatment for this virus.
All medical professionals can do for patients diagnosed with COVID-19 is keep their body healthy to figure off the virus on its own. Ventilators are used to assist in breathing in some cases and antibiotics are used to fight off secondary infections a patient may develop.
Experts also say it will take a year to 18 months to develop a vaccine because testing it in real world environments and ensuring it works is time-consuming.
What to know about Coronavirus:
Additional reporting from ABC News’ Erin Schumaker and Christina Carrega