Question: What is the Coronavirus?

Answer passage (source: WHO):
page_title: Q&A on coronaviruses (COVID-19)
section_headers: What is COVID-19?
section_content: COVID-19 is the infectious disease caused by the most recently discovered
coronavirus. This new virus and disease were unknown before the outbreak began
in Wuhan, China, in December 2019. COVID-19 is now a pandemic affecting many
countries globally.

Reviewer feedback on this answer:
This answer only provides information on the discovery and origin of Covid-19 which is an infectious disease caused by a coronavirus but does not explain or provide further information on the coronavirus itself.
This directly answers the question. It would also be helpful to have a link to more information about the illness caused by coronavirus.

Reviewer ratings:
Bad
Acceptable

Answer passage (source: WHO):
page_title: Q&A on coronaviruses (COVID-19)
section_headers: What is a coronavirus?
section_content: Coronaviruses are a large family of viruses which may cause illness in animals
or humans. In humans, several coronaviruses are known to cause respiratory
infections ranging from the common cold to more severe diseases such as Middle
East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS).
The most recently discovered coronavirus causes coronavirus disease COVID-19.

Reviewer feedback on this answer:
This does technically answer the question about Coronavirus. However, most likely the person wants to know about COVID-19, and this answer will guide them to ask another question about COVID-19. It would be better if there was a link to COVID-19.
This information answers the question directly by providing an explanation of what Coronaviruses are and the types of coronaviruses that had been discovered so far.

Reviewer ratings:
Could be Improved
Excellent

Answer passage (source: WHO):
page_title: Q&A on coronaviruses (COVID-19)
section_headers: What are the symptoms of COVID-19?
section_content: The most common symptoms of COVID-19 are fever, dry cough, and tiredness.
Other symptoms that are less common and may affect some patients include aches
and pains, nasal congestion, headache, conjunctivitis, sore throat, diarrhea,
loss of taste or smell or a rash on skin or discoloration of fingers or toes.
These symptoms are usually mild and begin gradually. Some people become
infected but only have very mild symptoms.
Most people (about 80%) recover from the disease without needing hospital
treatment. Around 1 out of every 5 people who gets COVID-19 becomes seriously
ill and develops difficulty breathing. Older people, and those with underlying
medical problems like high blood pressure, heart and lung problems, diabetes,
or cancer, are at higher risk of developing serious illness. However, anyone
can catch COVID-19 and become seriously ill. People of all ages who experience
fever and/or cough associated withdifficulty breathing/shortness of breath,
chest pain/pressure, or loss of speech or movement should seek medical
attention immediately. If possible, it is recommended to call the health care
provider or facility first, so the patient can be directed to the right
clinic.

Reviewer feedback on this answer:
This information is irrelevant to the question. The question is asking about what coronavirus is and this information is explaining about the common symptoms of Covid-19 and people who are at higher risk from Covid-19.
This is good information about the illness caused by coronavirus, but it doesn't talk much about the actual virus itself.

Reviewer ratings:
Bad
Could be Improved