What is a dead-end, or incidental, host? 

Which of the following statements about coronavirus virion structure is not true?

Which of the following statements about Chikunguyna virus is not true? 

Enveloped viruses are more difficult for the immune system to eliminate because the immune system must use the T cells to destroy the:

You are bitten by a Chikungunya virus-infected mosquito and develop severe joint pain. What type of virus transmission is this?

When you are done with that assay (if you used the correct one!), you find that the titer of the stock is 1.2 x 107 PFU/ml. What are two possible reasons why this number does not match your electron microscopy number? 

Which of the following features is true of all picornavirus virions ?

In what major way does the replication of a – strand RNA virus differ from that of a + strand RNA virus, and what key enzyme is required?

Why do influenza viruses require packaging of their RNA-dependent RNA polymerase? 

Noroviruses are unique in their ability to exploit commensal bacteria to stimulate their infection along the intestinal tract.