Question: Is there any info on how long COVID-19 can live on different dry surfaces?

Answer passage (source: WHO):
page_title: Q&A: Considerations for the cleaning and disinfection of environmental surfaces in the context of COVID-19 in non-health care settings
section_headers: Which surface disinfectants are effective against COVID-19 in non-health care setting environments?
section_content: In non-health care settings, sodium hypochlorite (bleach / chlorine) may be
used at a recommended concentration of 0.1% or 1,000ppm (1 part of 5% strength
household bleach to 49 parts of water). Alcohol at 70-90% can also be used for
surface disinfection. Surfaces must be cleaned with water and soap or a
detergent first to remove dirt, followed by disinfection. Cleaning should
always start from the least soiled (cleanest) area to the most soiled
(dirtiest) area in order to not spread the dirty to areas that are less
soiled.  
All disinfectant solutions should be stored in opaque containers, in a well-
ventilated, covered area that is not exposed to direct sunlight and ideally
should be freshly prepared every day.  
In indoor spaces, routine application of disinfectants to surfaces via
spraying is not recommended for COVID-19. If disinfectants are to be applied,
these should be via a cloth or wipe which is soaked in the disinfectant.

Reviewer feedback on this answer:
The question is asking about how long the virus lives on surfaces, but the answer is only about what solutions should be used to clean the surfaces. So even though both the question and answer are both about surfaces, the information given does not in any way relate to the question.
This answer relates to how to clean and disinfect, and not whether COVID-19 can live on different surfaces.

Reviewer ratings:
Bad
Bad

Answer passage (source: WHO):
page_title: Q&A: Infection prevention and control for health care workers caring for patients with suspected or confirmed COVID-19
section_headers: How long the 2019-nCoV can survive on a dry surface?
section_content: There is currently no data available on stability of 2019-nCoV on surfaces.
Data from laboratory studies on SARS-CoV and MERS-
CoV
have shown that stability in the environment depends on several factors
including relative temperature, humidity, and surface type. WHO continues to
monitor existing evidence around nCoV and will update when such evidence is
available.

Reviewer feedback on this answer:
This answer is direct and to the point of whether COVID-19 can survive on surfaces.
While there are no specific details given about surfaces, the answer does indicate that there is no information available, which generally does address and answer the question.

Reviewer ratings:
Excellent
Acceptable

Answer passage (source: WHO):
page_title: Questions relating to food businesses
section_headers: What is known about various conditions affecting survivability of the virus?
section_content: Very little is known about how the SARS-CoV-2 virus survives outside the human
body. Probably the most up-to-date summary of scientific information we have
on survival in the environment is from the European Centre for Disease control
(ECDC) and the following is extracted from their recent technical
report:
Recent publications have evaluated the survival of SARS-CoV-2 on different
surfaces. According to van Doremalen et al., the environmental stability of
SARS-CoV-2 is up to three hours in the air post-aerosolization, up to four
hours on copper, up to 24 hours on cardboard and up to two to three days on
plastic and stainless steel, albeit with significantly decreased titres [3].
These findings are comparable with results obtained for environmental
stability of SARS-CoV-1. These findings resulted from experiments in a
controlled environment and should be interpreted with caution in the real-life
environment. Moreover, different levels of environmental contamination have
been detected in rooms of COVID-19 patients, ranging from 1 out of 13 to 13
out of 15 samples testing positive for SARS-CoV-2 before cleaning. No air
samples were positive in these studies, but one sample from an air exhaust
outlet was positive indicating that virus particles may be displaced by air
and deposited on surfaces [4,5]. In a study of environmental contamination in
a Chinese hospital during the COVID-19 outbreak, SARS-CoV-2 was detected in
environmental samples from the COVID-19 dedicated intensive care units (ICU),
the COVID-19 dedicated obstetric isolation ward and the COVID-19 dedicated
isolation ward. SARS-CoV-2 was also detected on objects such as the self-
service printers used by patients to self-print the results of their exams,
desktop keyboards and doorknobs. Virus was detected most commonly on gloves
(15.4% of samples) and rarely on eye protection (1.7%) [6]. This evidence
shows the presence of SARS-CoV-2 in the environment of a COVID-19 patient,
therefore reinforcing the belief that fomites play a role in transmission of
SARS-CoV-2; however, the relative importance of this route of transmission
compared to direct exposure to respiratory droplets is still unclear.

Reviewer feedback on this answer:
The answer goes into a great deal of detail in terms of how long COVID-19 lasts on surfaces. It talks about specific surfaces, and how long the virus will live there. It also talks about the reduction in titres, even if the virus is technically still there.
This answer is very thorough and relevant to the question.

Reviewer ratings:
Excellent
Excellent