When do symptoms of the coronavirus disease typically start?

Symptoms may appear 2-14 days after exposure to the virus. Anyone can have mild to severe symptoms. People with these symptoms may have COVID-19: Fever or chills.

How late can symptoms of COVID-19 infection start?

Most people with symptoms had them by day 12. And most of the other ill people were sick by day 14. In rare cases, symptoms can show up after 14 days. Researchers think this happens with about 1 out of every 100 people.

What are some of the first symptoms of COVID-19?

Early symptoms reported by some people include fatigue, headache, sore throat or fever. Others experience a loss of smell or taste. COVID-19 can cause symptoms that are mild at first, but then become more intense over five to seven days, with worsening cough and shortness of breath.

When should you take a COVID-19 test after exposure?

YES: Get tested at least 5 days after exposure. Follow quarantine guidance while waiting to test.

Can you be infectious before starting to develop COVID-19 symptoms?

"A person with COVID-19 is considered infectious starting two days before they develop symptoms, or two days before the date of their positive test if they do not have symptoms," according to the CDC.

Recognizing Day to Day Signs and Symptoms of Coronavirus

How long is COVID-19 contagious?

Here's what we know from studies of prior variants, including Delta: On average, people can begin spreading the virus 2-3 days before their symptoms begin, but infectiousness peaks 1 day before their symptoms begin. On average, people can continue to spread the virus another 8 days after their symptoms began.

Is presymptomatic transmission of COVID-19 possible?

The possibility of presymptomatic transmission of SARS-CoV-2 increases the challenges of COVID-19 containment measures, which are predicated on early detection and isolation of symptomatic persons.

What should I do if I've been exposed to a confirmed case of COVID-19 if my vaccine is not up-to-date?

Stay home and quarantine for at least 5 full days. Wear a well-fitted mask if you must be around others in your home. Do not travel. Even if you don't develop symptoms, get tested at least 5 days after you last had close contact with someone with COVID-19.

What does it mean if I test negative for COVID-19?

A negative test result means that the virus that causes COVID-19 was not found in your sample. However, it is possible for this test to give a negative result that is incorrect (false negative) in some people with COVID- 19. You might test negative if the sample was collected early during your infection.

You could also be exposed to COVID-19 after your sample was collected and then have become infected. In particular, people infected with COVID-19 but who have no symptoms may not shed enough virus to trigger a positive test. This means that you could possibly still have COVID-19 even though the test result is negative.

What should I do if I have been in close contact with someone with COVID-19?

If you have come into close contact with someone with COVID-19 follow recommendations to quarantine and wear a well-fitting mask. Quarantine recommendations vary based on up-to-date vaccination status or history of prior COVID-19 infection in the past 90 days.

Can I have COVID-19 if I have fever?

If you have a fever, cough or other symptoms, you might have COVID-19.

What are some examples of mild illness of the coronavirus disease?

Mild Illness: Individuals who have any of the various signs and symptoms of COVID-19 (e.g., fever, cough, sore throat, malaise, headache, muscle pain, nausea, vomiting, diarrhea, loss of taste and smell) but who do not have shortness of breath, dyspnea, or abnormal chest imaging.

What can you take to lessen the mild COVID-19 symptoms at home?

Using over-the-counter medications when necessary. If you have a high fever, you can take a fever reducer, such as acetaminophen, to help bring it down. If you have body aches, a sore throat or cough, a pain reliever can help lessen the discomfort these symptoms can bring.

Can a person test negative and later test positive for COVID-19?

It is possible for this test to give a negative result that is incorrect (false negative) in some people with COVID- 19. This means that you could possibly still have COVID- 19 even though the test is negative. The amount of antigen in a sample may decrease the longer you have symptoms of infection.

Does a negative result rule out the possibility of COVID-19?

A negative result does not rule out COVID-19 and should not be used as the sole basis for treatment or patient management decisions. A negative result does not exclude the possibility of COVID-19.

What are consequences of a false negative COVID-19 test?

Risks to a patient of a false negative test result include: delayed or lack of supportive treatment, lack of monitoring of infected individuals and their household or other close contacts for symptoms resulting in increased risk of spread of COVID-19 within the community, or other unintended adverse events.

Do I have to quarantine if I have been exposed to COVID-19?

If you come into close contact with someone with COVID-19, you should quarantine if you are not up to date on COVID-19 vaccines. This includes people who are not vaccinated.

Do I need to isolate if I have symptoms but I have been vaccinated for COVID-19?

People who are confirmed to have COVID-19 or are showing symptoms of COVID-19 need to isolate regardless of their vaccination status. This includes: People who have a positive viral test for COVID-19, regardless of whether or not they have symptoms.

How long should I quarantine after exposure to COVID-19 if I am not fully vaccinated?

Since you are not up to date on your COVID-19 vaccines, you should quarantine for 5 full days, wear a well-fitting mask for 10 full days, get tested at least 5 days after close contact, and watch for symptoms.

What does presymptomatic mean in relation to COVID-19?

Presymptomatic means you're infected, and you're shedding the virus. But you don't yet have symptoms, which you ultimately develop. Unfortunately, the evidence suggests that you may be most contagious in the presymptomatic stage before you have any symptoms.

What is the difference between presymptomatic and asymptomatic cases of COVID-19?

A presymptomatic case of COVID-19 is an individual infected with SARS-CoV-2 who has not yet exhibited symptoms at the time of testing but who later exhibits symptoms during the course of the infection.

An asymptomatic case is an individual infected with SARS-CoV-2 who does not exhibit symptoms at any time during the course of infection.

What is a pre-symptomatic case of COVID-19?

A pre-symptomatic case of COVID-19 is an individual infected with SARS-CoV-2 who has not exhibited symptoms at the time of testing, but who later exhibits symptoms during the course of the infection.

How long do I need to stay isolated if I test positive for COVID-19?

If you test positive, you should isolate for at least 5 days from the date of your positive test (if you do not have symptoms). If you do develop COVID-19 symptoms, isolate for at least 5 days from the date your symptoms began (the date the symptoms started is day 0).

How long should I stay in home isolation if I have a COVID-19 infection?

Positive. The test detected the virus and you have an infection. Stay home for at least 5 days and isolate from others in your home.

Tell your close contacts. Wear a well-fitted mask when around others. If available, a N95 or KN95 respirator is recommended. Watch for symptoms.

How long do I need to stay in isolation if I have symptoms of COVID-19 but my symptoms are better?

If you continue to have fever or your other symptoms have not improved after 5 days of isolation, you should wait to end your isolation until you are fever-free for 24 hours without the use of fever-reducing medication and your other symptoms have improved.