Fenrir said:
What is the percentage of people that have had the virus twice out of the entire population of people that have had the virus? And do you think such a percentage is meaningful for policy discussion?
Which policies are you talking about?
The problem with reinfections is that it can apparently be pretty difficult to determine who are actually reinfected. If they have blood samples from both infections and can genetically sequence them to compare the viruses from both infections.
Also, coronaviruses are believed to have relatively short periods of immunity. Two coronaviruses, I think, may cause a common cold. Having had the common cold from them once seems to offer protection for as little as a few months.
Current CDC guidelines are that if you had covid-19 more than three months earlier and have an exposure to someone with covid-19 of at least 15 minutes at less than six feet, then you should quarantine for 14 days.
From
https://www.cdc.gov/coronavirus/2019-ncov/if-you-are-sick/quarantine.htmlQuote:
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.
...
Who needs to quarantine?
People who have been in close contact with someone who has COVID-19excluding 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.
What counts as close contact?
- You were within 6 feet of someone who has COVID-19 for a total of 15 minutes or more
- You provided care at home to someone who is sick with COVID-19
- You had direct physical contact with the person (hugged or kissed them)
- You shared eating or drinking utensils
- They sneezed, coughed, or somehow got respiratory droplets on you
My niece has covid and I do have regular contact with her at the office (family business), but being as those contacts tend to be short and often from at least six feet, especially this year, so I'm not covered by the above guidelines. However, as a reasonable precaution, I am avoiding contact with the elderly and with others who are at greater risk.