The belief that infectious agents may cause certain chronic diseases can be traced to the mid-19th century, when cancer was studied as a possible infectious disease. This effort met with little ...
Recombinant DNA Infectious organisms and viruses (like parasites, bacteria, fungi, prions, and viroids) Biologically active agents (like toxins, allergens, and venoms) Human blood and blood products ...
year and half of all deaths in developing countries, with six diseases causing 90 percent of deaths from infectious diseases: pneumonia, tuberculosis (TB), diarrheal diseases, malaria, measles, and ...
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