As fall settles in across the U.S., millions of Americans may find themselves battling seasonal allergies, colds or the flu — illnesses with overlapping symptoms that can be difficult to tell apart.
As the season brings chilly temperatures, many people get sick because of the sudden shift from pleasant warmth to cold; this works alongside fall allergies, often worsening both symptoms.
Colds, flu and allergies all affect the respiratory system, making it hard to breathe, especially when multiple illnesses combine.
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