Question

a week after janet returned home, passengers aboard the ship on a new cruise became ill with the same genetically sequenced strain of norovirus that had infected janet. why did this happen? a. noroviruses can persist on environmental surfaces for weeks, and it takes as few as 10 viral particles to cause an infection. b. infected people can shed norovirus in their stool for up to three weeks after recovery. c. the viruses are resistant to most common cleaning solutions used in food prep areas. d. all of the above

Explanation:

Noroviruses can remain on surfaces for weeks and are highly contagious with a low - particle infection threshold. Infected individuals can shed the virus in stool post - recovery, and the virus is resistant to common cleaning solutions in food prep areas. All these factors could contribute to the new outbreak.

Answer:

D. All of the above