which of the following is NOT a mechanism by which viruses can damage the human body (ie- harm us)? causes our viral infections may lead to the release of too much cytokines/chemical signals O may cause our defenses/immune system to over-react Othey produce and release toxins O may cause cancer Otheir replication (life cycle) destroys our cells

Rift Valley Fever (RVF) is a vector borne disease that infects people. Most cases are mild, but a sometimes it causes high fevers, seizures, and brain swelling. RVF epidemics have occurred at 5-10 yr intervals in drier areas of eastern Africa, and less frequently in southern Africa. Outbreaks are usually associated with periods of abnormally heavy rainfall or flooding. Between epidemics, the virus that causes Rift Valley Fever may remain dormant in eggs of mosquitoes. Cycling of the virus between mosquitoes and wild or domestic mammals has been shown to occur in many areas. VWhen emergence of infected mosquitoes, or introduction of virus to an area, coincides with abnormally wet conditions and the presence of a highly susceptible host population, a large epidemic may ensue when the virus is amplified in mammals and spread locally by many species of mosquitoes. The incidence of RVF peaks during the late rainy season. In areas with cold winters, both the disease disappears after the…

About how many species of viruses do people have In there lungs on average 17 1750 175 None None of these choices

1

Which of the following allows the AIDS virus, which contains RNA to insert viral DNA into the DNA of a host T-cells after the AIDS virus enters the cells? o Receptor proteins located on the surface of the virus o Reverse transcriptase, an enzyme encoded by the virus o The phospholipids found on the envelope of the virus o The protein that makes up the capsid of the virus