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20 Nov 2021
Coronaviruses have been infecting humans for decades, but differ in their pathogenesis. Why do the currently circulating coronaviruses (HCoV-299, HCoV-HKU, HCoV-NL6 and HCoV-OC43) not cause acute respiratory distress syndrome?
Choose the most correct answer from below.
Select one:
a. They no longer have an animal reservoir, so are less infectious
b. They have been circulating in the population for a long time, so we have developed herd immunity
c. They infect the upper respiratory tract only
Coronaviruses have been infecting humans for decades, but differ in their pathogenesis. Why do the currently circulating coronaviruses (HCoV-299, HCoV-HKU, HCoV-NL6 and HCoV-OC43) not cause acute respiratory distress syndrome?
Choose the most correct answer from below.
Select one:
a. They no longer have an animal reservoir, so are less infectious
b. They have been circulating in the population for a long time, so we have developed herd immunity
c. They infect the upper respiratory tract only
astrodabberLv10
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