Question: According to the WHO, which people should wear medical masks to prevent the spread of COVID-19?

Answer passage (source: WHO):
page_title: Q&A: Masks and COVID-19
section_headers: Does WHO recommend the use of non-medical masks in the community?
section_content: Currently there is not enough evidence for or against the use of masks
(medical or other) for healthy individuals in the wider community. WHO
continues to recommend that medical masks be worn by individuals who are sick
or those caring for them. WHO is actively studying the rapidly evolving
science on masks and continuously updates its guidance.
In the interim, to support countries in their decision-making process WHO has
provided advice through a risk-based approach for the use of masks in the
context of COVID-19.

Reviewer feedback on this answer:
Gives a bare bones but adequate answer.
This answer is excellent because it answers the question in a straight forward manner by saying that anyone who is sick should be wearing a mask.

Reviewer ratings:
Acceptable
Excellent

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:
Addresses and gives examples in response.
This answer is excellent because it answers the question in full and provides a lot of detailed information as to who should be wearing masks.

Reviewer ratings:
Excellent
Excellent

Answer passage (source: WHO):
page_title: Q&A: Masks and COVID-19
section_headers: What individuals should wear medical masks to prevent the spread of COVID-19 according to WHO?
section_content: Medical masks are recommended in health care settings. However, it is
important to remember that the use of masks should be combined with other key
infection prevention and control measures such as hand hygiene and physical
distancing, as they do not serve all purposes to protect against COVID-19.
WHO recommends the use of medical masks for the following individuals:
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. Healthcare workers are the most exposed because they are in
close contact with people with suspected or confirmed COVID-19 and their
surrounding environment, which are the main routes of transmission.
People who are sick and exhibiting symptoms of COVID-19
Why? Anyone who is sick, even with mild symptoms such as muscle aches,
slight cough, sore throat or fatigue, should isolate at home and use a medical
mask as much as possible according to WHO’s recommendation on home care of
patients with suspected COVID-19. Coughing, sneezing or talking can generate
droplets that can spread the infection. These droplets can reach the face of
others nearby or land on the surrounding environment. If an infected person
coughs, sneezes, or talks wearing a medical mask, this helps to protect those
nearby from infection.
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. Close and frequent contact with someone with
COVID-19 can put those caring for them 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 and
feasibility of use and the types of masks considered.
See “Advice on the use of masks in the context of COVID-19”.
WHO will continue to update guidance according to scientific findings.

Reviewer feedback on this answer:
Gives detailed information and link for more
This answer is excellent because it is super informative as to who should be wearing a mask, which is what the question was asking.

Reviewer ratings:
Excellent
Excellent