Centers for Disease Control and Prevention along with US Department of Homeland Security has classified biological agents into three categories based on the level of mortality, ease of spreading and the level of preparedness required to deal with them. These biological agents are mostly microorganisms which if not controlled can create a havoc on a big scale.
Category B consists of agents which have moderate potential for dissemination. These are the agents which effect food and water quality and lower down their safety levels. They moderately affect the population and mortality rate is low. However, uncontrolled they can spread and effect many people. For example, salmonella and zika.
Hold the insulin. NPO means they havent eaten and can not eat before surgery. The novolog is a fast acting insulin and the client would need to eat when taking it. The levemir should also be held because it is unclear as to how long it would be before the patient would be able to eat again.
