Flu prevention at work.

From the information card in the 'flu packet' handed out at work:

Selfscreening
Influenza is a contagious disease. There is currently an increase in the number of people with influenza. In order to reduce the spread of influenza in the workplace, the following is required of everybody:

Do not come to work/Leave work if you have:

• Chills, shivering, and a fever (temperature greater than 100.4deg)
  
• Onset of muscle aches, pains, and stiffness
  
• Sore throat
  
• Dry cough
  
• Trouble breathing
  
• Shortness of breath
  
• Loss of appetite
  
• Malaise
  
• Sneezing
  
• Confusion
  
• Tiredness
  

While some of those make sense, I now keep having an urge to call out to work and tell my boss "I can't come in to work today, I have malaise."