When the CDC informed blood bank leaders about the danger of HIV spread through HIV infected blood: (choose all that apply)     A. Resisted the idea of implementing control measures B. Banned IV drug users from donating blood C. Banned homosexual people from becoming blood donors D. Called HIV researchers and CDC epidemiologists “alarmists” and E. declared that there was not enough evidence to test all donated blood for HIV E. Blood bank leaders embraced the prevention strategy and immediately started testing all blood donated in the US

The researchers hypothesized that if resistant strains of group A streptococci existed in schoolchildren, they probably are circulating in the general public as well. Describe how they tested this hypothesis, and discuss the results of this experiment.

Which of the following statements is true about the HIV/AIDS situation in 2021? The number of new HIV infections per year in Sub-Saharan Africa is higher than ever before. The number of AIDS deaths per year in Sub-Saharan Africa is higher than ever before. Group of answer choices Statement I is true, but statement II is not. Statement II is true, but statement I is not. Both statements are true. Neither statement is true.

Select the correct statement from the following   a. The last known case of smallpox in the world occurred in Somalia in 1980   b. Reverend Henry Whitehead contributed towards investigation of the cholera outbreak in London   c. Edward Jenner demonstrated that inoculating humans with smallpox may help prevent cowpox     d. Dr. John Snow discovered Vibrio cholerae, the bacteria that causes cholera

The drugs you evaluated in your disc susceptibility tests have different potencies (see table C1; disc content). Which ONE of the following options, based on the laboratory data alone, is the most approapriate in the treatment of a patient with a UTI ? Select one: A. All the above drugs (A, B, C and D) could be considered B. Trimethoprim (zone size 30 mm)   C. Ampicillin (zone size 25 mm) D. Amoxicillin (zone size 15 mm) E. Cephalexin (zone size 25 mm)

Identify the statement that does not provide accurate evidence as to why HIV is so lethal.   a. During the course of infection, HIV increases immune activation by altering intestinal physiology to let more microbes into the blood supply.   b. Immune evasion increases in many infections due to HIV virions evolving new and unrecognizable epitopes (antigens).   c. In many individuals the virus population evolves to use different receptors to gain access to a greater diversity of host immune cells.   d. HIV causes enhanced replication and proliferation of T cells, which allows the immune system to work better at defending against pathogens.

Which of the following imaginary pieces of information does not represent a proportion or a %?   a. 80 out of 100 residents of a city own a car   b. One-thirds of a class session will be utilized for group exercises   c. 70% of students in a university are undergraduates   d. For every 100 vaccinated kids in a city, there are at least five who are not vaccinated

(You dont need an article or a website to answer the question) 1.On October 30, 2020 the Center for Disease Control (CDC) reported that the daily COVID-19 data showed there were 1.2 new infections per second and that the daily death rate was one death every 107 seconds. Answer the following questions. Show all your calculations and write a sentence about your conclusion:  A.Use the CDC data to calculate the total number of daily infections on October 30th.  B.How many deaths were reported on October 30th?

When there is an outbreak, epidemiologists investigate who are the people that developed the disease and what do they have in common, where it first occurred, and when it started. In summary, they are looking at the  ___________________ of the disease.   a. Determinants   b. Distribution   c. Complications   d. Natural History

d,e,f