How long can COVID-like symptoms last after a positive or negative test?
Research shows that people can experience COVID-like symptoms for up to 12 months after testing positive or negative for SARS-CoV-2 5. These symptoms often include fatigue, trouble breathing, and memory problems. Even if the initial infection was mild, some individuals continue to feel unwell for many months 5.
What the research says
A study specifically tracked adults in the United States and found that COVID-like symptoms persisted in a significant number of people for up to a year following their test result 5. This duration applies regardless of whether the initial test was positive or negative, suggesting that the immune response or other factors can cause lasting effects 5.
Specific symptoms like fatigue and memory loss are particularly common in this long-term phase 3. A meta-analysis comparing SARS-CoV-2 to other viruses found that fatigue and memory loss were significantly more frequent after a SARS-CoV-2 infection 3. This suggests these are specific consequences of the virus rather than just general post-viral effects 3.
The body's reaction to the virus can also involve complex changes in how the brain works. Survivors often show alterations in brain networks that control thinking and emotion 7. These changes are linked to symptoms like brain fog and difficulty concentrating, which can last for months 7. In children, the condition is also complex and can involve issues with the immune system and metabolism 4.
What to ask your doctor
- How long have my symptoms been lasting compared to the typical 12-month window?
- Are my symptoms like fatigue or brain fog common long-term effects of the virus?
- Could my symptoms be related to changes in my brain networks or immune system?
- What treatments are available for persistent symptoms that have lasted this long?
This question is drawn from common patient questions about Infectious Disease and answered using cited medical research. We do not provide individualized advice.