COVID symptoms: tests, home care and when to get help

In short

• Symptoms overlap with colds and flu: fever or chills, cough, sore throat, congestion, fatigue, aches and headache.
• Test when the result changes what you do, such as when you are at higher risk, care for someone vulnerable or have symptoms that do not fit another cause.
• Most people recover at home with rest, fluids and over-the-counter medicine used as directed on the label.
• If you are at higher risk of severe illness, get tested promptly and talk to a clinician, because treatment may lower your risk.
• Trouble breathing, persistent chest pain, new confusion or blue-gray lips or skin need 911 right away.

What COVID-19 is today

COVID-19 is caused by the virus SARS-CoV-2. Most people have now been vaccinated, been infected, or both, and many cases are milder than they were early on. Mild for most is not mild for everyone, though.

The WHO lists the groups at higher risk of severe disease: older adults, people with conditions such as high blood pressure, diabetes, obesity or chronic lung, heart, liver or kidney disease, pregnant women, people with weakened immune systems and unvaccinated people. Most people with mild illness recover without medical treatment.

Symptoms to look for

The CDC says symptoms can appear 2 to 14 days after exposure, and the list may change with new variants. Common ones are:

• fever or chills;
• cough, sore throat, congestion or a runny nose;
• fatigue and muscle or body aches;
• headache;
• new loss of taste or smell;
• shortness of breath or trouble breathing;
• nausea, vomiting or diarrhea.

You cannot reliably tell COVID-19 from flu or a cold by symptoms alone. A test is the way to find out.

Testing: when and how

1. Take a home antigen test.Follow the instructions on the box exactly, including the wait time and how to collect the sample.
2. Read a negative result carefully.According to the FDA, a negative result does not rule out COVID-19, because tests can miss an infection early on. If you have symptoms, test again 48 hours after the first negative, for at least two tests in all.
3. If you were exposed but feel fine.Wait at least 5 full days after the exposure, then test, and repeat 48 hours later. The FDA suggests at least three tests over 5 days in that situation.
4. Act on a positive result.A positive test means you likely have COVID-19. Contact your health care provider, especially if you are at higher risk, and follow the CDC advice on staying home.
5. Ask about a lab test.If every result is negative but you are still worried, your provider may suggest a laboratory molecular test or a test for flu, RSV or other respiratory viruses.

The FDA also suggests considering a test before you spend time with someone at high risk, such as an older adult or a person with a weakened immune system.

Taking care of yourself at home

• Stay home and away from other people, including healthy household members, while you have symptoms.
• Rest, and ease back into exercise only after the fever is gone.
• Drink fluids steadily through the day, especially with fever, vomiting or diarrhea.
• Over-the-counter fever and pain relievers can help with aches and fever. Follow the label or your pharmacist's advice and do not exceed the daily limit.
• If you cannot fully separate at home, a well-fitted mask, clean hands, distance and fresh air all lower the chance of spreading the virus.

Treatment for people at higher risk

Medical treatment for COVID-19 exists. Clinicians choose it based on how severe the illness is, your risk of getting worse, your age, symptoms, other conditions and any medicines that could interact with it. The CDC says treatment may lower your risk of severe illness, so if you have risk factors, seek prompt testing and contact your clinician rather than waiting to see how you feel.

When you can return to normal life

The CDC gives a simple rule. You can go back to normal activities when, for at least 24 hours, your symptoms are improving overall and you have had no fever without using fever-reducing medicine.

You may still pass the virus on after that, although you are typically less contagious. For the next 5 days, take added precautions: cleaner air, good hand hygiene, a well-fitted mask, distance or testing when you are around others. This matters most around people at higher risk, and people with weakened immune systems may spread the virus for longer. If symptoms get worse or a fever returns, stay home again.

Long COVID

The WHO defines long COVID, or post COVID-19 condition, as symptoms that begin within about 3 months of the illness and last at least 2 months. Global estimates suggest around 6 in 100 people with COVID-19 develop it, though newer research indicates the risk has dropped. Common symptoms include:

• fatigue;
• breathlessness;
• trouble thinking or concentrating;
• headaches;
• muscle or joint aches;
• poor sleep, anxiety or low mood.

If symptoms linger, see your primary care provider. The WHO suggests prioritizing rest and sleep, and not returning to usual activity until a flare-up has settled. Vaccination appears to reduce the chance of developing long COVID.

Vaccination and prevention

Vaccines protect against severe illness, hospitalization and death, although they do little to reduce spread. Ask your primary care provider or pharmacist which vaccine you are due for, because recommendations change as the virus does. Staying home when you are sick, cleaning your hands and improving ventilation help against all respiratory viruses.

Red flags: when to call 911

Call 911, or go to the nearest emergency department and tell staff you may have COVID-19, if there is any of the following:

• trouble breathing, including being unable to speak in full sentences;
• persistent chest pain or pressure;
• new confusion;
• being unable to wake or stay awake;
• pale, gray or blue lips, nail beds or skin, which may look different depending on skin tone;
• loss of speech or movement.

People at higher risk should seek help early if they are worried about how they feel.

Questions and answers

Sources

1. WHO — Coronavirus disease (COVID-19)
2. CDC — COVID-19 Symptoms and Warning Signs
3. CDC — Preventing Spread of Respiratory Viruses When You're Sick
4. FDA — Understanding At-Home OTC COVID-19 Antigen Diagnostic Test Results
5. WHO — Post COVID-19 condition (long COVID)

Sources checked on 29 October 2026.