Question: What makes people with certain disabilities more at risk of contracting and having more severe cases of COVID-19?

Answer passage (source: Australia):
page_title: Coronavirus (COVID-19) advice for people with chronic health conditions
section_headers: Conditions that increase the risk of serious illness from COVID-19
section_content: Anyone could develop serious or severe illness from COVID-19, but those with
chronic health conditions or weakened immune systems are at greater risk.
If you are working and you have a chronic condition or your immune system is
compromised, talk to your employer or workplace about having a risk
assessment.
Chronic conditions that put you at greater risk
These conditions increase your risk if you are aged over 65, or if you are an
Aboriginal or Torres Strait Islander person aged over 50:

chronic renal failure
coronary heart disease
congestive cardiac failure
chronic lung disease such as severe asthma, cystic fibrosis, bronchiectasis, suppurative lung disease, chronic obstructive pulmonary disease or chronic emphysema
poorly controlled diabetes
poorly controlled hypertension

Immune system conditions that put you at greater risk
You are at increased risk at any age if your immune system is significantly
weakened:

due to haematologic neoplasms such as leukaemias, lymphomas and myelodysplastic syndromes
post-transplant, if you have had a solid organ transplant and are on immunosuppressive therapy
post-transplant, if you have had a haematopoietic stem cell transplant in the last 24 months or are on treatment for graft versus host disease (GVHD)
by primary or acquired immunodeficiency including HIV infection
by having chemotherapy or radiotherapy

Medical treatments that put you at greater risk
You are also at increased risk if you take any biological disease-modifying
anti-rheumatic drug (bDMARD) or any of the following immunosuppressive drugs:

azathioprine, more than 3mg per kg per day
6-mercaptopurine, more than 1.5mg per kg per day
methotrexate, more than 0.4mg per kg per week
high-dose corticosteroids (20mg or more of prednisone per day or equivalent) for 14 days or more
tacrolimus
cyclosporine
cyclophosphamide
mycophenolate
any combination of these or other DMARDs

Disease-modifying anti-rheumatic drugs (DMARDs) are used to treat inflammatory
forms of arthritis. They suppress the immune system and this slows the
development of the arthritis.
Some DMARDS have a broad effect on the immune system while the biological
DMARDS target specific parts of the immune system.

Reviewer feedback on this answer:
Has a detailed information about who's at higher risk of catching COVID-19, with some information about why.
This answer gives examples and makes a thorough list of disabilities that are more likely to get COVID-19, and why.

Reviewer ratings:
Acceptable
Excellent

Answer passage (source: Australia):
page_title: Coronavirus (COVID-19) advice for people with disability
section_headers: Why people with disability are at risk
section_content: Some people with disability have higher rates of health issues including
chronic conditions and weakened immune system.
Many people with disability rely on support and assistance from family
members, carers and support workers.

Reviewer feedback on this answer:
Mentions people with disabilities, but doesn't explain why they're at higher risk of catching COVID-19.
This answer perfectly answers the question as to what makes those with certain disabilities more likely to contract COVID-19.

Reviewer ratings:
Bad
Excellent

Answer passage (source: Australia):
page_title: Coronavirus (COVID-19) advice for older people
section_headers: People most at risk
section_content: Your risk of serious illness from coronavirus increases if you are:

aged 70 years or over
aged 65 years or over and have a chronic medical condition
an Aboriginal and Torres Strait Islander person aged 50 years and over who has a chronic medical condition
immune suppressed

There is currently no cure or vaccine for coronavirus, or immunity in the
community, so you need to protect yourself.

Reviewer feedback on this answer:
Lists which groups are at higher risk of catching COVID-19, but doesn't explain what makes them vulnerable.
This answer only addresses those who are more likely to get COVID-19, not why people with certain disabilities are more likely, and thus making this answer not suitable.

Reviewer ratings:
Bad
Bad