Seasonal illnesses can come on quickly, and many have similar symptoms but require different care. Our experts help you recognize symptoms, know when to seek care and get the right treatment for you or your child.

MU Health Care is here to support you with clear guidance and timely care.

Start with Your Symptoms

Many seasonal illnesses have overlapping symptoms. Looking at how symptoms begin and change can help guide your next steps.

Mild, Gradual Symptoms

Symptoms that start slowly and stay mild are often linked to common viral illnesses. Examples include:

  • Mild cough
  • Runny or stuffy nose
  • Sneezing
  • Sore throat

These symptoms often improve with rest, fluids and time.

Sudden or More Intense Symptoms

Symptoms that begin quickly or feel more severe may need closer attention, such as:

  • Body aches
  • Extreme fatigue
  • Fever
  • Migraine or severe headache
  • Worsening cough

Our team can help determine whether testing, treatment or closer monitoring is needed. If you’re experiencing any of these symptoms, schedule an appointment with a primary care provider or visit one of our convenient care options.

Common Seasonal Illnesses We See

Below are some of the most common seasonal illnesses. If symptoms overlap or worsen, our team can help clarify what’s going on and recommend treatment options based on your exact needs.

Common Cold

Colds usually develop gradually and have mild symptoms, such as:

  • Mild cough
  • Runny or stuffy nose
  • Sneezing
  • Sore throat

Common colds typically recover within a week to 10 days with home care.

Flu (Influenza)

The flu often starts suddenly and feels more intense than a cold. Symptoms may include:

  • Body aches
  • Chills
  • Fever
  • Headache
  • Severe fatigue

Early care can shorten how long symptoms last and reduce complications.

COVID-19

COVID-19 symptoms range from mild to severe and can look like other seasonal illnesses. Symptoms can include:

  • Cough
  • Fever or chills
  • Fatigue
  • Loss of taste or smell
  • Shortness of breath

Testing can help guide care and next steps.

RSV (Respiratory Syncytial Virus)

RSV is common in infants and young children, but adults can also be affected. Symptoms include: 

  • Cough
  • Decreased appetite in infants
  • Runny nose
  • Wheezing

Young children may need closer monitoring, especially if their breathing changes.