Update Tuesday, March 5: The Centers for Disease Control and Prevention (CDC) have officially revised their national guidance for how long people with COVID should isolate from others — saying that as of March 1, COVID-positive people can now return to work or regular activities once “symptoms are improving overall” and they’ve been fever-free for at least 24 hours without use of a fever-reducing medication.
Previously, the CDC advised that people who test positive for COVID stay home and isolate from other people for at least five days, regardless of the severity of their symptoms — or whether they had symptoms at all. The CDC says that “depending on the length of symptoms,” the length of time a person now isolates with COVID “could be shorter, the same, or longer than the previous guidance” for the disease.
Once a person’s COVID symptoms are mild and improving “for at least 24 hours,” and any fever has been gone without the aid of medication for that period of time, the CDC says that they “are encouraged to take additional prevention strategies for the next 5 days to curb disease spread, such as taking more steps for cleaner air, enhancing hygiene practices, wearing a well-fitting mask, keeping a distance from others, and/or getting tested for respiratory viruses.”
The CDC’s new guidelines now mostly resemble California’s own updated COVID isolation recommendations, which the state revised back in January. The biggest difference between California’s new guidelines and the CDC’s revised advice is what people who test positive for COVID but do not have symptoms — known as asymptomatic infections — should do when it comes to isolation and avoiding infecting others.
The state says that asymptomatic people with COVID should wear a mask indoors around others for 10 days and avoid higher-risk people for the same duration. The CDC says that asymptomatic “may be contagious” and should only take “added precautions[s],” including possible masking, for five days.
This 2024 update represents the first time during the pandemic that the CDC has moved away from set periods of isolation for people with COVID. At the outset of the pandemic in 2020, the CDC stipulated a 10-day period of isolation for COVID-positive patients — a period shortened to five days in December 2021. This update was still accompanied by guidance to wear a well-fitted mask for another five days.
The CDC says that this new guidance “brings a unified approach to addressing risks from a range of common respiratory viral illnesses,” bundling guidance on COVID into that for other viruses like flu and RSV as one set of Respiratory Virus Guidance. The webpage that previously contained the CDC’s COVID isolation guidance has now been archived, and the agency’s online COVID information hub contains a note stating that “The content of this page will be updated soon.”
Original story from Jan. 19 continues:
California health officials have updated the state’s official guidance on how long people with COVID-19 should isolate from others — with new recommendations that represent a relaxing of the isolation guidelines still in place from the Centers for Disease Control and Prevention (CDC).
Up until now, the CDC has recommended that people who test positive for COVID-19 stay home and away from other people for at least five days — regardless of whether or not they have symptoms. But on Jan. 9, the California Department of Public Health (CDPH) issued an update that their official recommendations for Californians would now move away from the five-day rule in favor of “instead focus[ing] on clinical symptoms to determine when to end isolation.”
Now, the new guidance for COVID-positive Californians says that they should still stay home until their symptoms improve and wear a mask around others indoors for 10 days. But COVID-positive people without symptoms can leave their homes and be in public, CDPH says — albeit as long as they stay masked for that period.
This big change in state guidance, coming amid a wave of respiratory virus infections around California — and running counter to the CDC’s current advice — might be causing confusion in your household. Keep reading for the breakdown of the new official guidelines for what happens when you test positive, why the state says they’re making this change, and how to think about the risk your positive COVID-19 test poses to others.
What are the official COVID-19 isolation recommendations for Californians now? What’s changed?
CDPH’s new isolation guidelines are focused on whether or not a COVID-positive person has symptoms. (Jump straight to the guidance for people without symptoms.)
The new guidance for COVID-positive Californians who have symptoms:
- Stay home until symptoms improve and any fever has been gone 24 hours without medication
- Wear a mask indoors around others for 10 days
- Avoid higher-risk people for 10 days.
CDPH’s message is clear: You still need to stay home — initially. But now, instead of setting a clear time period like before — five days at home, 10 days masking — CDPH now says that you should judge when you’re safe to leave the house: “until you have not had a fever for 24 hours without using fever-reducing medication AND other COVID-19 symptoms are mild and improving.”