Question: When should people wear facemasks?

Answer passage (source: WHO):
page_title: Q&A on coronaviruses (COVID-19)
section_headers: Does WHO recommend wearing medical masks to prevent the spread of COVID-19?
section_content: Currently, there is not enough evidence for or against the use of masks
(medical or other) in healthy individuals in the wider community. However, WHO
is actively studying the rapidly evolving science on masks and continuously
updates its guidance.
Medical masks are recommended primarily in health care settings, but can
be considered in other circumstances (see below). Medical masks should be
combined with other key infection prevention and control measures such as hand
hygiene and physical distancing.
Healthcare workers
Why? Medical masks and respirators such as N95, FFP2 or equivalent are
recommended for and should be reserved for, healthcare workers while giving
care to patients. Close contact with people with suspected or confirmed
COVID-19 and their surrounding environment are the main routes of
transmission, which means healthcare workers are the most exposed.
People who are sick and exhibiting symptoms of COVID-19
Why? Anyone who is sick, with mild symptoms such as muscle aches, slight
cough, sore throat or fatigue, should isolate at home and use a medical mask
according to WHO’s recommendation on home care of patients with suspected
COVID-19. Coughing, sneezing or talking can generate droplets that cause can
spread the infection. These droplets can reach the face of others nearby and
land on the surrounding environment. If an infected person coughs, sneezes, or
talks while wearing a medical mask, this can help to protect those nearby from
infection. If a sick person needs to go to a health facility they should wear
a medical mask.
Anyone taking care of a person at home who is sick with COVID-19
Why? Those caring for individuals who are sick with COVID-19 should wear a
medical mask for protection. Again, close, frequent and prolonged contact with
someone with COVID-19 puts caretakers at high risk. National decision makers
may also choose to recommend medical mask use for certain individuals using a
risk-based approach. This approach takes into consideration the purpose of the
mask, risk of exposure and vulnerability of the wearer, the setting, the
feasibility of use and the types of masks to be considered.

Reviewer feedback on this answer:
Is on-topic and answers question, but provides dangerous misinformation about whether asymptomatic individuals should wear masks.
This does not answer the question. This answer does not provide any information on when people should be wearing face masks. Instead, it provides information and explanation on who should be wearing face masks and why should these groups of people wear face masks.

Reviewer ratings:
Bad
Bad

Answer passage (source: WHO):
page_title: Q&A: Masks and COVID-19
section_headers: What is WHO recommending to countries that are considering public mask use in community?
section_content: For countries that are currently considering the use of masks, WHO advises
decision makers to apply a risk-based approach and consider the following:
Purpose of mask use: if the intention is preventing the wearer
transmitting infection to others (that is source control) or to offer
protection to the wearer against infection (that is prevention).
Risk of exposure to COVID-19

due to epidemiology/number of cases in the population: if there is high community transmission and other measures such as contact tracing or ability to carry out testing are not possible. 
depending on occupation: e.g., individuals working in close contact with public (e.g., community health worker, cashier). 

Vulnerability of the mask wearer/population: for example, if supplies are
adequate medical masks could be used by people with comorbidities, such as
cardiovascular disease or diabetes mellitus, older people, immunocompromised
patients.
Setting in which the population lives: settings with high population
density (e.g. refugee camps, those living in cramped conditions) and settings
where individuals are unable to keep a safe distance (e.g. crowded buses or
other transport).
Feasibility: availability and costs of masks, access to clean water to
wash non-medical masks, and ability of mask wearers to tolerate adverse
effects of wearing a mask.
Type of mask: medical mask versus non-medical mask (prioritization of
medical masks for health care providers, symptomatic people and their
caregivers).
In addition to these factors, potential advantages of the use of masks by
healthy people in the community setting include reducing potential exposure
risk from an infected person during the ‘pre-symptomatic’ period or if an
infected person is asymptomatic.
There are potential risks and disadvantages that should be taken into account
in any decision-making process on the use of masks:

Non-medical or cloth masks could increase potential for COVID-19 to infect a person if the mask is contaminated by dirty hands and touched often, or kept on other parts of the face or head and then placed back over the mouth and nose 
Depending on the type of mask used, could cause difficulty in breathing 
They can lead to facial skin breakdown 
They can lead to difficulty with communicating clearly 
They can be uncomfortable to wear 
It is possible that mask use, with unclear benefits, could create a false sense of security in the wearer, leading to diminished practice of recognized beneficial preventive measures such as physical distancing and hand hygiene. 


Reviewer feedback on this answer:
Gives extensive guidance on when masks should be worn and discusses different types of mask.
This information does not answer the question. The question is asking for information on when people should be wearing face masks and the answer provides information on what factors decision maker should be considering when deciding to give recommendation for their people to wear face masks.

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Answer passage (source: WHO):
page_title: Q&A: Masks and COVID-19
section_headers: What is WHO’s view on masks?
section_content: WHO recognizes that there are many questions about the use of face masks to
prevent the transmission of COVID-19 in the community, and that many countries
are recommending that people wear them. Wearing a medical mask can limit the
spread of certain respiratory viral diseases, including COVID-19. However, the
use of a mask alone is not sufficient to provide an adequate level of
protection. Other measures such as physical distancing and hand hygiene should
be adopted.
WHO aims to provide the most scientifically sound yet practical
recommendations for the safety and wellbeing of individuals in all settings.
At present, WHO recommends a risk-based approach to be considered by decision
makers when deciding in which settings and circumstances non-medical masks
could be used in the community.
Please see: Advice on the use of masks.

Reviewer feedback on this answer:
Recommends that everyone wear masks in addition to washing hands and socially distancing.
This information does not provide any information on when people should be wearing face masks. Instead, it provides information on why people should be wearing face masks during Covid-19 and other precautions people should be taking to protect themselves against Covid-19.

Reviewer ratings:
Excellent
Bad