| http://www.w3.org/ns/prov#value | - cur over the next few weeks since pertussis is highly contagious, the letter said.According to the New Hampshire Department of Health and Human Services, pertussis is a contagious bacterial infection of the respiratory tract.Usually it causes a persistent cough that follows a normal cold.The cough occurs in explosive bursts ending with a high-pitched whooping sound and occasionally vomiting.
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