What is believed to be the primary route of infection with SARS-CoV-2, the virus leading to COVID-19?

An animal, such as an arthropod, that transmits a pathogen from one host to another is a _______.

The _______ system of blood proteins acts to lyse foreign cells and viruses.

The subjective evidence of disease sensed by the patient is termed a(n) _______.

The minimum amount of microbes in the inoculating dose is the _______.

The objective, measurable evidence of disease evaluated by an observer is termed a(n) _______.

Animals that participate in the life cycles of pathogens and transmit pathogens from host to host are _______.

During a recent survey, 0.014% of the population showed evidence of a particular respiratory infection. Please select the term that is illustrated by this statistic.

A _______ is an infection indigenous to animals that can, on occasion, be transmitted to humans.

The total number of deaths in a population due to a disease is the _______ rate.