Whooping cough causes intense coughing fits that can lead to vomiting, exhaustion, and breathing difficulties. It's most dangerous for infants and young children, and early treatment matters.
When a person with a strong cough feels tired every day, even while the presence of coughing fits is reduced, they're likely experiencing the mid-stage of whooping cough. The body is simultaneously fighting an active infection and recovering from the physical strain of repeated coughing fits, which together drive a level of fatigue that doesn't improve much with rest.

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