The actual paper talks in terms of half-lives, so it would be gradually less chance of any spread over that 24-hour period.
> and can survive on cardboard for a day—up to 24 hours—post-contamination.
And the actual paper: https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v...
NPR talked about a study testing cardboard actually. Up to 24h under ideal conditions.
Copper doesn't immediately kill it.
Apparently the virus that causes COVID-19 survives this long on various surfaces [0, 1]:
Aerosols: Up to 3 hours
Copper: Up to 4 hours
Cardboard: Up to 24 hours
Plastic: Up to 3 days
Stainless Steel: Up to 3 days
COVID-19 doesn't "survive" very long on copper surfaces.
The TTL might be days.
Direct link to the study: https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v...
I believe re point #1, it's this study: https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v...
Abstract: "32 HCoV-19 (SARS-2) has caused >88,000 reported illnesses with a current case-fatality ratio of ~2%. Here, we investigate the stability of viable HCoV-19 on surfaces and in aerosols in comparison with SARS-CoV-1. Overall, stability is very similar between HCoV-19 and SARS-CoV-1. We found that viable virus could be detected in aerosols up to 3 hours post aerosolization, up to 4 hours on copper, up to 24 hours on cardboard and up to 2-3 days on plastic and stainless steel. HCoV-19 and SARS-CoV-1 exhibited similar half-lives in aerosols, with median estimates around 2.7 hours. Both viruses show relatively long viability on stainless steel and polypropylene compared to copper or cardboard: the median half-life estimate for HCoV-19 is around 13 hours on steel and around 16 hours on polypropylene. Our results indicate that aerosol and fomite transmission of HCoV-19 is plausible, as the virus can remain viable in aerosols for multiple hours and on surfaces up to days."
It's not peer reviewed yet so reader beware
The CDC themselves were involved in the study that says you're wrong.
If someone is able to find the source for this info I'd really appreciate it. Just spent like 10 minutes trying to find the paper they're citing but I can't find it and I don't have time to keep looking now. Maybe it isn't published?
It might be this one, actually. This one suggests it can live up to 72 hours on certain surfaces. https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v...
I'd love to have some more data on this if anyone can provide.
Of course not, it’s used for other stuff. Read the abstract of this paper: https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v... You will understand washing hand is not enough, also need to sanitize stuff bringing into the house
This study  says it can last on surfaces for 2-3 days.
Not sure why I can’t reply to the commenter below. Anyway, here’s a link backing up the parent’s claim, contrary to whatever CDC is saying: https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v...