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Dangerous viruses: Are you referring to most virulent virus, fatal rate without or with treatment or most deaths historically? Dangerous viruses include: Marburg Virus, Ebola Zaire, Hantavirus, H5N1 (Avian Flu), Junin Virus (Argentine Hemorrhagic Fever), Lassa Fever, Crimea – Congo Fever,Machupo virus (Bolivian hemorrhagic fever), Kyasanur Forest Virus (KFD), Rabies, Smallpox & Dengue fever. ...Read moreSee 2 more doctor answers
Wash your hands: Many viral illnesses are transmitted by direct contact with an infected person or else by touching a contaminated object (also known as a fomite), then touching our mucous membranes. ...Read more
That depends: are you asking about most # of deaths over history or virulence of actual organisms. I can't state #1. But the following are serious: Ebola, Influenza, Pneumonic Plague, Smallpox, SARS, Tetanus, Inhalational Anthrax & more. For more info see "List of human disease case fatality rates" http://en.wikipedia.org/wiki/List_of_human_disease_case_fatality_rates ...Read moreSee 1 more doctor answer
Many answers: I will vote for largest numbers as well as overall nastiness (my opinion): virus: 1. Influenza - killed most people in pandemics 2. Ebola - evil, nasty, dead quickly (but rare) bacteria: 1. Yersinia pestis - plague pandemics 2. Clostridium botulinum - botulism toxin is very very toxic in small amounts. ...Read more
Absolutely. Immune: systems job is to constantly screen & protect from cancer cells, viruses, bacteria & fungal infections. How many we may have to fight at once varies widely & can be a huge challenge. Initial immune system response to virus (just snippets of DNA/RNA with a protein coating; no living cell) commonly takes ~7 days; thus the value of vaccines to prompt the immune system to prepare for rapid response. ...Read moreSee 1 more doctor answer
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