The US CDC has guidelines on who should be quarantined. It's been posted many times and don't have at my fingertips right now.. but distance and time is considered. MOO Biden was far away... but transmission happens greater with talking a lot, singing, etc. as we have seen with documented super spreader events.
As to "everyone at the debate"... MOO No. They would not fall within qualifications for such. MOO
Those who follow this thread may have such link for you to post here to help.
I think I have found the CDC link to rules on quarantine.
Coronavirus Disease 2019 (COVID-19)
When to Quarantine
Stay home if you might have been exposed to COVID-19
Updated Sept. 10, 2020
Note:
At this time, we have limited information about reinfections with the virus that causes COVID-19. This is a new virus, and CDC is actively working to learn more. We will provide updates as they become available. Data to date show that a person who has had and recovered from COVID-19 may have low levels of virus in their bodies for up to 3 months after diagnosis. This means that if the person who has recovered from COVID-19 is retested within 3 months of initial infection, they may continue to have a positive test result, even though they are not spreading COVID-19.
There are no confirmed reports to date of a person being reinfected with COVID-19 within 3 months of initial infection. However, additional research is ongoing. Therefore, if a person who has recovered from COVID-19 has new symptoms of COVID-19, the person may need an evaluation for reinfection, especially if the person has had close contact with someone infected with COVID-19. The person should isolate and contact a healthcare provider to be evaluated for other causes of their symptoms, and possibly retested.
CDC recommends that all people, whether or not they have had COVID-19, take steps to prevent getting and spreading COVID-19. Wash hands regularly, stay at least 6 feet away from others whenever possible, and wear masks.
For more information:
Quarantine is used to keep someone
who might have been exposed to COVID-19 away from others. Quarantine helps prevent spread of disease that can occur before a person knows they are sick or if they are infected with the virus without feeling symptoms. People in quarantine should stay home, separate themselves from others, monitor their health, and follow directions from their state or local health department.
Quarantine or isolation: What's the difference?
Quarantine keeps someone who might have been exposed to the virus away from others.
Isolation keeps someone who is infected with the virus away from others, even in their home.
Who needs to quarantine?
People who have been in close contact with someone who has COVID-19—excluding people who have had COVID-19 within the past 3 months.
People who have tested positive for COVID-19 do not need to quarantine or get tested again for up to 3 months as long as they do not develop symptoms again. People who develop symptoms again within 3 months of their first bout of COVID-19 may need to be tested again if there is no other cause identified for their symptoms.
other symptoms of COVID-19
- If possible, stay away from others, especially people who are at higher risk for getting very sick from COVID-19
When to start and end quarantine
You should stay home for 14 days after your last contact with a person who has COVID-19.
For all of the following scenarios, even if you test negative for COVID-19 or feel healthy, you should stay home (quarantine) since symptoms may appear 2 to 14 days after exposure to the virus.
See scenarios below to determine when you can end quarantine and be around others.
Continued at link.
So VP and wife should definitely quarantine despite testing negative, according to CDC. As well as Biden or anyone else who had contact.
POTUS and FLOTUS are in isolation. Everyone else should quarantine for 14 days.
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