The cough starts as dry and hacking and progresses by the 3rd day to wet with thick mucous. The cough can worsen for the next 4-7 days and could last for over 2 weeks. This is the major symptom of influenza. Cough in children can be croupy and serious.
Smokers are at risk for significant bronchitis and pneumonia.
These can be severe for the first few days and will slowly improve. Fatigue Fatigue is common and severe, lasting for 1-3 weeks. Sore Throat Sore throat is most common in older children and adults. It can be severe for the first few days. Vomiting or diarrhea is unusual in adults.