Flu, viral fever, and COVID-19 all cause fever and respiratory symptoms, but key differences in onset, symptom patterns, ...

Valley fever is an emerging fungal disease in the western United States that most often causes flu-like symptoms, but can also cause dangerous or even deadly complications. By analyzing data on ...

Fever, cough and body aches can point to flu, viral fever or Covid. With symptoms overlapping and risks varying, doctors say knowing how to differentiate early can prevent complications and stop ...

Allergies do not cause a fever, but they may lead to health issues that can cause a fever, such as a sinus infection. Other conditions, such as bacterial or viral infections, can have similar symptoms ...