The bacterium Haemophilus influenzae remains a formidable pathogen despite widespread vaccination against its encapsulated forms. While the introduction of conjugate vaccines has dramatically reduced ...
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Signs and symptoms of influenza (flu)
Medically reviewed by Michael Menna, DO The flu usually starts quickly.Severe flu cases can lead to pneumonia, with symptoms such as chest pain, cough, and difficulty breathing.Children under 2 years ...
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