What Is Long COVID (PASC)?

Some people with COVID-19 have lingering symptoms for weeks or months after they begin to recover. You might know this as “long COVID.” Experts have coined a new term for it: post-acute sequelae SARS-CoV-2 infection (PASC).

Research shows that about 10% of people between ages 18 to 49 who have COVID-19 get long COVID. The odds go up to 22% for those 70 or older. But it can happen to anyone, whether you’re otherwise healthy or have other health conditions. You can get it even if your earlier COVID-19 symptoms were mild or moderate.


Experts don’t know why people get long COVID. Research continues on that, as well as:

  • Treatment and prevention
  • How long it can take to recover from it
  • Whether long COVID can make heart and brain problems more likely
  • How someone can build immunity after they have COVID-19
  • What role vaccines play

In the meantime, if your doctor diagnoses you with long COVID, they may order blood tests to see if you have any underlying issues that might cause it. They'll also take a look at your medical history.


Long COVID appears to affect each person in different ways. You might notice a wide range of things that could linger for a long time. Common symptoms include:

You might also have:

In rare cases, long COVID can affect your organs. You may get:

If you have any of these, tell your doctor about it right away.

Long COVID and Vaccines

As scientists research the causes and symptoms of long COVID, a large study in the United Kingdom looked at data on more than 1.2 million partially or fully vaccinated people.

It found that fully vaccinated people -- those who had gotten both doses of COVID-19 vaccines like those made by Pfizer/BioNTech, Moderna, and Oxford/AstraZeneca -- had almost 50% lower odds of having COVID symptoms at least 28 days after infection.  

The study didn’t include people who got the single-dose Johnson & Johnson/Janssen vaccine, which is not widely used in the U.K.


Treatment of Long COVID

Long COVID symptoms can last weeks or months. Currently, there’s no specific treatment or cure for people with long-haul symptoms.

For long COVID symptoms like rapid heartbeat and fatigue, lifestyle changes or medications may help. Talk with your doctor about what might work best for you.

Changes like these might help ease long COVID symptoms:

  • Understand when you have the most energy. Plan how you want to use it, and pace yourself. Don’t overdo it. Break up tasks into small chunks. Take lots of small breaks throughout the day.
  • Don’t stop doing things that make you breathless. Keep using your muscles to help make them stronger. But know your limits, and don’t push yourself too hard.
  • Exercise when you can. Start light and build the intensity. You can start with walks and slowly add weights to help build strength. Exercise also releases endorphins that can lift your mood.
  • Use a walking stick to lean on if you’re feeling breathless.
  • To ease muscle or joint pain, try low-intensity flexibility exercises like yoga or tai chi, light stretches, and strength exercises. Stair-climbing and resistance bands can help improve strength.
  • Have a daily routine as much as possible. This will help with memory and mood issues.
  • If you’re having trouble remembering things, write them down in a diary or a calendar.
  • Try to curb distractions when you work, or keep a to-do list. This can help improve your focus.
  • Reach out to friends and family when you need support and help.

Before you start any exercise or diet routine, check with your doctor or a specialist like a nutritionist or physical therapist.

As long COVID symptoms may last a long time and vary in intensity, be kind to yourself through the recovery process. Know that some days may be worse than others.

If you have severe shortness of breath or chest pain, call your doctor, call 911, or go to the nearest hospital.

Living with symptoms like brain fog, breathlessness, or chest and joint pain on a daily basis can take a toll on mental health, too. Psychological treatment may help people with long-haul symptoms manage uncertainty and anxiety and better navigate the recovery process.

This can include:

  • Trauma therapy
  • Cognitive behavioral therapy
  • Acceptance and commitment therapy


What You Can Do

The best way to avoid long COVID is to limit the spread of COVID-19 infection and get vaccinated as soon as you can.

The CDC recommends that everyone 12 and older get the COVID-19 vaccine if you’re eligible for it. The vaccines are safe and effective to prevent and limit the spread of the virus. If you have COVID-19, wait until the illness clears before getting the shot. If you’re not sure, ask your doctor.

Also, wear a mask and try to stay at least 6 feet away from other people when you're out in public. Avoid very crowded places. Wash your hands often with soap and water, or use alcohol-based sanitizer.

WebMD Medical Reference Reviewed by Neha Pathak, MD on September 02, 2021



CDC: “Frequently Asked Questions about COVID-19 Vaccination,” “Long-Term Effects of COVID-19,” “About COVID-19 Vaccines.”

National Institutes of Health: “NIH launches new initiative to study ‘Long COVID.’”

The BMJ: “Management of post-acute covid-19 in primary care.”

Journal of American Medical Association Network: “Sequelae in Adults at 6 Months After COVID-19 Infection.”

The Lancet Infectious Disease: “Risk factors and disease profile of post-vaccination SARS-CoV-2 infection in UK users of the COVID Symptom Study app: a prospective, community-based, nested, case-control study.”

Cleveland Clinic: “What It Means to Be a Coronavirus ‘Long-Hauler.’”

American Psychological Association: “Treating patients with long COVID.”

British Heart Foundation: “Long Covid: The symptoms and tips for recovery.”

NHS (U.K.): “Coronavirus (COVID-19) vaccines.”

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