Quarantine or isolation is not needed from exposure alone for those that are vaccinated, per
$1:
> Quarantine if you have been in close contact (within 6 feet of someone for a cumulative total of 15 minutes or more over a 24-hour period) with someone who has COVID-19, unless you have been fully vaccinated. People who are fully vaccinated **do NOT** need to quarantine after contact with someone who had COVID-19 unless they have symptoms. However, fully vaccinated people should get tested 5-7 days after their exposure, even if they don’t have symptoms and wear a mask indoors in public for 14 days following exposure or until their test result is negative.
Omicron doesn’t change this. The Delta variant already evaded vaccines in terms of infection. The evidence suggests that Omicron is even more mild than Delta, and that vaccines still protect extremely well against severe disease. If every place had to shut down just from exposure to Omicron, the entire economy would be shut down again and people would have to be laid off. Almost nobody wants that.
Omicron spreads so fast that almost everyone is exposed all the time when around other people.