Two expert committees under the Centre for Health Protection (CHP) concluded after reviewing publicly-available data that the BioNTech product is effective against the UK and Brazil variants of the coronavirus.
Professor Lau Yu-lung said while the vaccine still works against the South African variant, it is somewhat less effective.
==> 語言偽術, less efffective, 明白嗎? 即係話你英文水平有限, 比d 面你, 唔話你唔識英文呀