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Pertussis is an infectious disease of the respiratory tract caused by the Gram-negative bacterium Bordetella pertussis. Pertussis vaccines have led to a significant reduction in the incidence and severity of pertussis in infants worldwide. Despite this decrease in incidence, pertussis remains one of the principal causes of vaccine-preventable deaths; in 2008, the World Health Organization reported...
Transmission of highly pathogenic avian influenza (HPAI) viruses in poultry flocks is associated with huge economic losses, culling of millions of birds, as well as human infections and deaths. In the cases where vaccination against avian influenza is used as a control measure, it has been found to be ineffective in preventing transmission of field strains. Reports suggest that one of the reasons...
Pertussis is an infectious disease of the respiratory tract caused by the Gram-negative bacterium Bordetella pertussis. Pertussis vaccines have led to a significant reduction in the incidence and severity of pertussis in infants worldwide. Despite this decrease in incidence, pertussis remains one of the principal causes of vaccine-preventable deaths; in 2008 the World Health Organization reported...
Pertussis is an infectious disease of the respiratory tract caused by Bordetella pertussis. Worldwide, whole-cell pertussis vaccines have led to a significant reduction in the incidence and severity of pertussis in infants. Despite this decrease in incidence, pertussis remains one of the principal causes of vaccine-preventable deaths; there are 20–40 million cases per year worldwide and an estimated...
Gastric cancer is the second most common cause of cancer death in the world. Helicobacter pylori (H. pylori) has been classifed as a defnite cause of gastric cancer. There are tests for diagnosing H. pylori, and the infection can be eradicated with medical therapy. Population-based screening for H. pylori infection is controversial as a means of decreasing the incidence of gastric cancer. Whether...
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