Is body temperature a good screening criteria for COVID-19?

Screening for fever is not sensitive enough to detect the vast majority of COVID-19 cases in the age group between 18 and 25 years. Even a low-temperature cut-off value of 37.1 °C will miss more than a third of symptomatic cases of COVID-19 on the day of diagnosis and will cause a large number of false-positives.

Is temperature screening effective to detect COVID-19?

The U.S. Centers for Disease Control and Prevention (CDC) lists fever as one criterion for screening for COVID-19 and considers a person to have a fever if their temperature registers 100.4 or higher -- meaning it would be almost 2 degrees above what's considered an average “normal” temperature of 98.6 degrees.

What temperature is considered a fever for COVID-19?

Fever is a common symptom of COVID-19. A body temperature of 100.4 degrees F or higher is generally seen in people with COVID-19, although some people may feel as though they have fever even though their temperature readings are normal.

What is considered a high fever in adults for COVID-19?

A high-grade fever in adults is 103 degrees F or higher.

Can we take an employee's temperature as they report for work during the COVID-19 pandemic?

• Businesses should follow CDC and FDA guidance for screening employees who have been exposed to COVID-19.
• Pre-screen employees for symptoms or fever before starting work.
• Employees with fever and symptoms should be advised to see a doctor for evaluation and should be deferred to Human Resources for next steps.

Normal Body Temperature

Can an employee's temperature be taken by the employer when they report for work?

• Businesses should follow CDC and FDA guidance for screening employees who have been exposed to COVID-19.
• Pre-screen employees for symptoms or fever before starting work.
• Employees with fever and symptoms should be advised to see a doctor for evaluation and should be deferred to Human Resources for next steps.

How can you safely measure a person's temperature during the COVID-19 pandemic?

Temperature measurement can be one part of the assessment to determine if a person has an elevated temperature potentially caused by a COVID-19 infection. One method to measure a person's surface temperature is the use of "no-touch" or non-contact temperature assessment devices, such as thermal imaging systems (also known as thermal imaging cameras or infrared telethermographic systems) or non-contact infrared thermometers. The use of other temperature assessment devices, such as oral thermometers, requires physical contact which may increase the risk of spreading infection.

What are some signs of COVID-19 that need immediate medical attention?

• Trouble breathing
• Persistent pain or pressure in the chest
• New confusion
• Inability to wake or stay awake
• Pale, gray, or blue-colored skin, lips, or nail beds, depending on skin tone

What can you take to lower fever when you are infected with COVID-19?

In terms of specifics: acetaminophen (Tylenol), naproxen (Aleve) or ibuprofen (Advil, Motrin) can help lower your fever, assuming you don’t have a health history that should prevent you from using them. It’s usually not necessary to lower a fever – an elevated temperature is meant to help your body fight off the virus.

What are some of the emergency warning signs of COVID-19?

Seek medical attention immediately if you or a loved one is at home and experiencing emergency warning signs, including difficulty breathing, persistent pain or pressure in the chest, new confusion, inability to stay awake, or bluish lips or face.

Can you run a low-grade fever with COVID-19?

Yes. A fever is one of the common symptoms of COVID-19, but you can be infected with the coronavirus and have a cough or other symptoms with no fever, or a very low-grade one — especially in the first few days.

Are you still contagious 10 days after the first day of COVID-19 symptoms?

So, there is potential for people to be infectious beyond their seven-day isolation if they are still symptomatic. After ten days, most people are not infectious. Multiple studies have shown there is very little, if any, transmission after day ten, regardless of the variant.

Can you have COVID-19 without a fever?

Yes, you can have Covid (coronavirus) without a fever or with a very low-grade fever that is hardly noticeable, particularly with the Omicron variant. It is also possible to have Covid-19 with no symptoms at all and the only way you would know this is if you took a Covid-19 test.

What is the most accurate diagnostic test to detect COVID-19?

Reverse transcription polymerase chain reaction (RT-PCR)-based diagnostic tests (which detect viral nucleic acids) are considered the gold standard for detecting current SARS-CoV-2 infection.

How accurate are home COVID-19 tests?

Even though demand for COVID-19 tests greatly overwhelmed supply earlier in the pandemic, rapid home tests are more available today. While home tests provide a quick, accurate result, the flip side is that many test results are no longer reported to health authorities.

Can thermal screening at workplace prevent the spread of coronavirus disease?

Some people may reduce fever with a fever-reducing medication if they are concerned about the possible consequences of not coming to work. Relying on temperature screening alone will not stop the spread of COVID-19 at work.

Thermal screening at the workplace can be considered part of a package of measures to prevent and control COVID-19 at the workplace. Workers should be encouraged to self-monitor their health, possibly with the use of questionnaires, and take their own temperature regularly at home.

Workplaces should adopt “stay at home if unwell” and flexible sick leave policies to discourage workers with symptoms consistent with COVID-19 from coming to the workplaces.

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 you take Tylenol or Advil after receiving the COVID-19 vaccine?

Yes, it's perfectly fine to take Tylenol or Advil after the COVID-19 vaccine. This is recommended by experts because it can help ease the side effects you might experience.

How long could the COVID-19 virus linger in your body?

But for most infected people, virus levels in the body peak between three and six days after the original infection, and the immune system clears the pathogen within 10 days. The virus shed after this period is generally not infectious.

Should I go to the hospital if I have mild COVID-19 symptoms?

Mild COVID-19 cases still can make you feel lousy. But you should be able to rest at home and recover fully without a trip to the hospital.

Can COVID-19 symptoms get worse as it goes along?

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.

What are COVID-19 toes?

Erythema pernio, known as chilblains, have been frequently reported in younger individuals with mild COVID-19 to the extent that they have earned the moniker “COVID toes.” However, the reason behind their development is not yet apparent.

Is it safe to use oral thermometer during the COVID-19 pandemic?

The use of other temperature assessment devices, such as oral thermometers, requires physical contact which may increase the risk of spreading infection.

How have infrared thermometers been utilized during COVID-19 pandemic?

With the surge of COVID-19, many hospitals and businesses have implemented temperature screenings for employees, patients and customers using infrared thermometers. These devices offer efficiency, safety and accuracy in detecting fevers in large groups of people. They don’t, however, detect COVID-19 in these individuals.

How can you safely take a client's temperature using a temporal thermometer?

1. Turn on the thermometer.
2. Gently sweep the thermometer across the client’s forehead.
3. Remove the thermometer and read the number:
○ Fever: Any temperature 100.4 F or greater is considered a fever.
○ No fever: People with temperatures at or below 100.3 F may continue into the shelter using normal procedures.
4. Clean the thermometer with an alcohol wipe (or isopropyl alcohol on a cotton swab) between each client. You can reuse the same wipe as long as it remains wet.