23.  Which of the following interferes with the ability of viruses to replicate?

70.  A raised thicken scar due to excessive collagen formation is called:

42.    An epidemic occurring over a widespread area is called a:

13.  Which of the following is the most potent toxin known to man?

55.  What system is triggered by exposure to a specific potentially harmful substance, such as a disease microorganism in the environment or through a vaccination?

74.  The most resistant bacteria to destruction are called:

57.  What type of immune response involves the production of T cells in response to exposure to an antigen and is a delayed response that is important in tissue transplant rejection?

96.  Which of the following indwelling intravenous catheters can be used for long-term access if needed?

6.  The smallest microbial organisms are:

3. The first person to use an antiseptic in surgery to prevent infection was?