Q: I had a brief fever after flu exposure, but tested negative and my fever dropped. Can I take my mask off around my baby?

Medically reviewed by Sang Hyun Ahn, MD

Content edited by Myeongchan Kim, MD

This post is a dramatization of a question and answer session experienced by our actual medical reviewers. Please note that this content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.

Question:

I met someone on Saturday who tested positive for the flu on Monday. Yesterday around 5 PM, I developed a fever of 38°C. Just to be safe, I immediately went to a clinic and got a flu test, which came back negative! I have been wearing a mask at home to protect my baby. My temperature stayed between 37.7°C and 38°C but dropped to normal around 10 PM, and I have maintained a normal temperature since. I have absolutely no respiratory symptoms, chills, or muscle aches at all.

If it were the flu, wouldn't the fever persist and the symptoms get worse? Is it safe to take my mask off now?

Answer:

It is completely understandable that you are worried about your baby after being exposed to the flu. The good news is that your negative test result and the fact that your fever has rapidly dropped are both very reassuring signs.

Here is a breakdown of your situation regarding the flu exposure:

• Incubation Period: The flu typically has an incubation period of 1 to 4 days (with an average of 2 days). Since your exposure was on Saturday, symptoms could potentially appear up to Tuesday.

• Test Accuracy: Early rapid tests can sometimes result in false negatives, especially if they are performed within the first 24 hours of symptom onset.

However, evaluating your current clinical condition is very encouraging:

• Fever Resolution: The fact that your temperature dropped from 38°C back to normal so quickly points more toward a mild cold or another minor viral illness rather than the flu.

• Lack of Symptoms: Having no respiratory symptoms, body aches, or chills is an excellent sign. The flu typically causes a persistent high fever (39°C–40°C), severe muscle aches, and respiratory issues like a cough.

Regarding your question about wearing a mask:

• When with your baby: It is recommended to continue wearing your mask around your baby until Thursday. This covers the maximum incubation window and provides an essential extra layer of safety.

• When alone: You can safely remove the mask.

• If symptoms change: Put your mask back on immediately if you develop any new symptoms.

Important Precautions to Keep in Mind:

• If you suddenly develop a high fever, severe body aches, or worsening symptoms, you should return to the clinic to consider getting retested for the flu.

• Make sure your baby's vaccination status is up to date and continue to wash your hands frequently.

• If your baby develops a fever, becomes unusually fussy, or shows a decrease in feeding, please visit a pediatrician immediately.

For now, given your swift recovery and lack of other symptoms, there is no need to be overly concerned!

For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.

fevercoach.us

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