17.COVID-19 (COVID), a once-in-a-century pandemic, in 2020 has so far resulted in over 80 million infectioncases and close to 2 million mortality world-wide. The vaccine devcloped by Pfizer for COVID was approvedby USA, UK and many other countries. Which statements concerning the Pfizer vaccine for COVID is/areCORRECT?
(A) The vaccine developed by Pfizer is an RNA vaccine
(B) The administration of the vaccine is through intravascular injection route
(C) The RNA encodes spike protein, the receptor of COVID vinus
(D) The principle of the RNA vaccine is to induce antibody against the RNA of COVID virus
(E)The Pfizer vaccine is not working for the new variant of COVID virus found in UK