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| There are more than 1400 known pathogens that can infect and sicken humans,22 and each day, researchers around the world continue the search for pathogens that may cause new diseases. Doctors and scientists call these bacteria and viruses emerging pathogens. Emerging pathogens often develop in animals and wildlife, then change or mutate and spread to humans. |
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| During the past decade, several new pathogens have emerged or reemerged, including: |
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West Nile virus |
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Severe Acute Respiratory Syndrome (SARS) |
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Monkeypox |
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Parvovirus |
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Ebola virus |
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Avian flu |
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Nipah virus |
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Variant Creutzfeldt-Jakob disease (vCJD) |
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| Approximately 20,000 people have hemophilia in the United States.23 Of those, about 10% to 15% have been infected with HIV24, and a large percentage have been infected with hepatitis C as a result of blood-product use. When a person is infected with a virus like HIV or hepatitis, the body's immune system must work overtime to fight off threats from the infection. |
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| The goal is to keep people who are already living with an infection from getting another infection. Called co-infection, the presence of two or more infections in the blood system can put the body's immune system under a great deal of strain. Over time, this can weaken the immune system, leaving a person vulnerable to pathogens that are considered harmless to those with healthy immune systems. |
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| Recombinant products are made without human blood or plasma. They can be used without the risk of human viral transmission. |
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