The symptoms of COVID-19, the flu, and allergies have some overlap, but are often different. The main symptoms of COVID-19 are: tiredness fever cough shortness of breath Sneezing is not typical. Flu symptoms are similar to COVID-19 including fever and body aches. But you may not find shortness of breath as a symptom with the flu. Allergy symptoms are usually more chronic and include sneezing, coughing, and wheezing. What are the symptoms of the flu? Here are some of the common symptoms of the flu: Fever The flu almost always causes an increase in your body temperature. This is also known as a fever. Most flu-related fevers range from a low-grade fever around 100°F (37.8°C) to as high as 104°F (40°C). Although alarming, it’s not uncommon for young children to have higher fevers than adults. If you suspect your child has the flu, see their doctor. You may feel “feverish” when you have an elevated temperature. Signs include chills, sweats, or being cold despite your body’s high te...