15. Which of the following descriptions about COVID-19 virus is NOT correct?
(A) The RNA-dependent RNA polymerase is a primary target for anti-COVID-19 virus drug remdesivir.
(B) Antigenic drit is a kind of genetic variation that can result in a new strain ofCOVID-19 virus particles.
(C) Coronaviruses are prone to undergo antigenic shift by combining twodifferent viruses to make a novel strain.
(D) COVID-19mRNA vaccines contain the instructions for making the SARS-CoV-2 spike protein
(E) COVID-19 mRNA vaccines require to be stored at an ultra-cold freezer attemperatures between -80*C and -60*C for up to 6 months.