Flu (Influenza) is a contagious viral disease. It affects almost every person in the world. The risk of infection can be reduced by yearly vaccination. While the disease is common, not all affected get complications. Although, some high-risk groups may get more complex. These include young children and elderly people of 65 years of age or more. Cases of pregnancy and any age group with some chronic medical conditions may also be at risk. These conditions may include diabetes, asthma and congestive heart failure. In addition, there are some warning signs that should alert the patient to seek medical help. These are difficulty in breathing, initial recovery in flu, then fever and worsening of a cough. The patient can feel chest pain, dizziness, and mental status changes as well like confusion.
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