Question: Will chest CT be useful against coronavirus?

Answer passage (source: CDC):
page_title: Frequently Asked Questions
section_headers: Symptoms & Testing
What is antibody testing? And can I be tested using this method?
section_content: Antibody testing checks a sample of a person’s blood to look for antibodies to
SARS-CoV-2, the virus that causes COVID-19. These antibodies are produced when
someone has been infected, so a positive result from this test indicates that
person was previously infected with the virus.
CDC is working with other federal agencies to evaluate the performance of
commercially manufactured antibody tests that are becoming increasingly
available from healthcare providers. This evaluation is expected to be
completed in early May.
We do not know yet if the antibodies that result from infection with SARS-
CoV-2 can protect someone from reinfection with this virus (immunity) or how
long antibodies to the virus will protect someone. Scientists are conducting
research to answer those questions.
Antibody tests may not be able to tell you if you are currently infected
because it typically takes 1 to 3 weeks to develop antibodies to SARS-CoV-2.
To tell if you are currently infected, you would need a test that identifies
the virus in samples from your upper respiratory system, such as a
nasopharyngeal swab.

Reviewer feedback on this answer:
The question is asking about CT scans but the answer is talking about antibody tests. These 2 things aren't related at all so it's a bad answer
This answer is irrelevant to the question. The question is asking about chest CT scans in diagnosing coronavirus and this answer is providing information on antibody testing to detect infection of Covid-19 in human.

Reviewer ratings:
Bad
Bad

Answer passage (source: CDC):
page_title: Clinical Questions about COVID-19: Questions and Answers
section_headers: Testing, Diagnosis, and Notification
Should chest CT be used for diagnosis of COVID-19?
section_content: Clinicians considering use of chest CT scans for diagnosis or management of
COVID-19 patients should consider whether such imaging will change clinical
management. The American College of Radiology (ACR) recommends that CT should
not be used to screen for COVID-19, or as a first-line test to diagnose
COVID-19, and that CT should be used sparingly and reserved for hospitalized,
symptomatic patients with specific clinical indications for CT. Appropriate
infection control procedures should be followed before scanning subsequent
patients. For more information see, ACR Recommendations for the use of Chest
Radiography and Computed Tomography (CT) for Suspected COVID-19
Infectionexternal iconexternal icon.

Reviewer feedback on this answer:
This addresses the question and points out the uncertainty surrounding CT scans with COVID. There's a link to further recommendations about this so it's a decent response
This information answers the question directly. This information provides explanation and recommendation on chest CT scan use in diagnosing Covid-19 in patients.

Reviewer ratings:
Acceptable
Excellent

Answer passage (source: CDC):
page_title: Clinical Questions about COVID-19: Questions and Answers
section_headers: Testing, Diagnosis, and Notification
Do existing commercially available multiple respiratory virus panels detect SARS-CoV-2?
section_content: Yes. There are commercially developed respiratory panels with multi-pathogen
molecular assays that can detect respiratory pathogens, including SARS-CoV-2,
influenza, and other human coronaviruses that can cause acute respiratory
illness. The U.S. Food and Drug Administration (FDA) maintains a list of tests
that includes viral tests with Emergency Use Authorizationexternal
icon (EUA).

Reviewer feedback on this answer:
This answer is not relevant to the question. The answer provides information on commercially developed respiratory panels to detect respiratory pathogens such as Covid-19 virus and other human coronavirus. It does not provide any information of whether or not chest CT scan will be useful in diagnosing coronavirus in human.
This response seems to be answering some entirely different question directly. I'm not even sure what they're answering...something about testing, but it isn't CT scans

Reviewer ratings:
Bad
Bad