Ebola and Marburg virus infections are extremely serious and frequently fatal. Like other viruses in the class known as filoviruses, Ebola and Marburg infections cause extensive bleeding. Which of the following statements about Ebola and Marburg infections is NOT correct?
Bodily fluids from people who have died of these diseases can transmit infection.
People are not contagious until after symptoms have developed.
These infections are usually spread via mosquito bites.
These infections usually infect animals rather than people.
