I believe they are carbohydrates
A sudden shift in the tectonic plates of the earth
Designing efficacious norovirus vaccines remains a major challenge due to several factors:
(1) the extreme genetic variability within the norovirus family and within genogroups
(2) the rapid evolution of antigenically dissimilar pandemic GII.4 norovirus strains
(3) the lack of lasting immunity upon natural exposure to noroviruses in at least a proportion of the population.
Answer:
it is hard to read
the first one is prokaryotes
then both
then pro
then eu
then eu
and eu
Explanation: