Bi\u1ebfn ch\u1ee7ng m\u1edbi khi\u1ebfn ng\u01b0\u1eddi nhi\u1ec5m c\u00f3 m\u1eadt \u0111\u1ed9 virus t\u1eadp trung \u1edf m\u0169i v\u00e0 h\u1ecdng cao h\u01a1n g\u1ea5p 2 l\u1ea7n. \u1ea2nh: AP.<\/figcaption><\/figure>\nB.1.427\/B.1.429 mang trong m\u00ecnh ba \u0111\u1ed9t bi\u1ebfn \u1ea3nh h\u01b0\u1edfng t\u1edbi gai protein c\u1ee7a virus, l\u00e0 b\u1ed9 ph\u1eadn gi\u00fap virus x\u00e2m nh\u1eadp v\u00e0o t\u1ebf b\u00e0o c\u1ee7a ng\u01b0\u1eddi, bi\u1ebfn t\u1ebf b\u00e0o th\u00e0nh nh\u00e0 m\u00e1y \u0111\u1ec3 virus nh\u00e2n r\u1ed9ng.<\/p>\n
M\u1ed9t trong ba \u0111\u1ed9t bi\u1ebfn n\u00e0y, k\u00fd hi\u1ec7u L452R, \u1ea3nh h\u01b0\u1edfng t\u1edbi RBD c\u1ee7a virus, gi\u00fap ch\u00fang b\u00e1m d\u00ednh ch\u1eb7t h\u01a1n v\u00e0o t\u1ebf b\u00e0o m\u1ee5c ti\u00eau c\u1ee7a v\u1eadt ch\u1ee7.<\/p>\n
\u0110\u1ed9t bi\u1ebfn L452R c\u00f3 v\u1ebb nh\u01b0 khi\u1ebfn bi\u1ebfn ch\u1ee7ng California t\u00e0n ph\u00e1 s\u1ee9c kh\u1ecfe ng\u01b0\u1eddi nhi\u1ec5m \u1edf m\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng h\u01a1n.<\/p>\n
Trong ph\u00f2ng th\u00ed nghi\u1ec7m, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 t\u00e1i t\u1ea1o m\u1ed9t virus ch\u1ec9 mang theo \u0111\u1ed9t bi\u1ebfn L452R. K\u1ebft qu\u1ea3, virus n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng x\u00e2m nh\u1eadp v\u00e0o m\u00f4 ph\u1ed5i con ng\u01b0\u1eddi m\u1ea1nh h\u01a1n 40% so v\u1edbi c\u00e1c ch\u1ee7ng virus \u0111ang ph\u1ed5 bi\u1ebfn kh\u00e1c kh\u00f4ng c\u00f3 \u0111\u1ed9t bi\u1ebfn L452R.<\/p>\n
Virus c\u00f3 \u0111\u1ed9t bi\u1ebfn L452R c\u0169ng l\u00e2y lan m\u1ea1nh g\u1ea5p 3 l\u1ea7n so v\u1edbi c\u00e1c ch\u1ee7ng kh\u00f4ng mang \u0111\u1ed9t bi\u1ebfn.<\/p>\n
B\u00e1c s\u0129 Bruce Walker, gi\u00e1m \u0111\u1ed1c s\u00e1ng l\u1eadp Vi\u1ec7n Y khoa Ragon \u1edf Boston, chuy\u00ean gia v\u1ec1 mi\u1ec5n d\u1ecbch, cho bi\u1ebft c\u00e1c virus th\u01b0\u1eddng \u0111\u1ed9t bi\u1ebfn theo c\u00e1ch khi\u1ebfn ch\u00fang m\u1ea1nh h\u01a1n nh\u01b0ng bi\u1ebfn \u0111\u1ed5i di truy\u1ec1n c\u0169ng t\u1ea1o ra \u201cg\u00f3t ch\u00e2n Achilles\u201d cho ch\u00fang. V\u00ed d\u1ee5, m\u1ed9t ch\u1ee7ng m\u1edbi c\u00f3 kh\u1ea3 n\u0103ng l\u00e2y lan m\u1ea1nh h\u01a1n th\u00ec \u0111\u1ed9c l\u1ef1c l\u1ea1i y\u1ebfu h\u01a1n.<\/p>\n
Nh\u01b0ng \u0111i\u1ec1u n\u00e0y d\u01b0\u1eddng nh\u01b0 kh\u00f4ng c\u00f2n \u0111\u00fang v\u1edbi bi\u1ebfn ch\u1ee7ng California. B\u00e1c s\u0129 Walker cho bi\u1ebft ch\u01b0a t\u00ecm th\u1ea5y d\u1ea5u hi\u1ec7u virus m\u1ea5t \u0111i \u0111\u1ed9c l\u1ef1c d\u00f9 \u0111\u00e3 \u0111\u1ed9t bi\u1ebfn khi\u1ebfn ch\u00fang l\u00e2y lan m\u1ea1nh h\u01a1n.<\/p>\n
\u201cK\u1ecbch b\u1ea3n \u00e1c m\u1ed9ng\u201dTrong ph\u00f2ng th\u00ed nghi\u1ec7m, bi\u1ebfn ch\u1ee7ng California cho th\u1ea5y n\u00f3 c\u00f3 kh\u1ea3 n\u0103ng kh\u00e1ng l\u1ea1i c\u00e1c kh\u00e1ng th\u1ec3 \u0111\u01b0\u1ee3c c\u01a1 th\u1ec3 ng\u01b0\u1eddi t\u1ea1o ra sau l\u1ea7n nhi\u1ec5m virus \u0111\u1ea7u ti\u00ean ho\u1eb7c \u0111\u01b0\u1ee3c ti\u00eam vaccine Covid-19.<\/p>\n
So v\u1edbi c\u00e1c ch\u1ee7ng virus hi\u1ec7n nay, bi\u1ebfn ch\u1ee7ng California khi\u1ebfn hi\u1ec7u qu\u1ea3 c\u1ee7a kh\u00e1ng th\u1ec3 gi\u1ea3m xu\u1ed1ng \u1edf m\u1ee9c \u0111\u1ed9 \u201c\u0111\u00e1ng quan ng\u1ea1i\u201d, c\u00e1c nh\u00e0 khoa h\u1ecdc t\u1eeb \u0110\u1ea1i h\u1ecdc California c\u1ea3nh b\u00e1o.<\/p>\n
Theo t\u00ednh to\u00e1n, c\u00e1c kh\u00e1ng th\u1ec3 m\u1ea5t \u0111i 50% hi\u1ec7u qu\u1ea3 khi \u0111\u1ed1i m\u1eb7t v\u1edbi bi\u1ebfn ch\u1ee7ng California. \u0110\u00e2y l\u00e0 s\u1ed1 li\u1ec7u \u0111\u00e1ng b\u00e1o \u0111\u1ed9ng, n\u1ebfu x\u00e9t \u0111\u1ebfn th\u1ef1c t\u1ebf bi\u1ebfn ch\u1ee7ng Nam Phi ch\u1ec9 l\u00e0m gi\u1ea3m \u0111i 16% hi\u1ec7u qu\u1ea3 c\u1ee7a kh\u00e1ng th\u1ec3.<\/p>\n
\u201cT\u00f4i tin r\u1eb1ng theo th\u1eddi gian, bi\u1ebfn ch\u1ee7ng n\u00e0y s\u1ebd t\u00e1c \u0111\u1ed9ng t\u1edbi vi\u1ec7c ti\u00eam ch\u1ee7ng\u201d, b\u00e1c s\u0129 Chiu c\u1ea3nh b\u00e1o.<\/p>\n
Bi\u1ebfn ch\u1ee7ng B.1.1.7 v\u00e0 bi\u1ebfn ch\u1ee7ng B.1.427\/B.1.429 \u0111\u1ec1u l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a \u0111\u1ed9t bi\u1ebfn khi\u1ebfn ch\u00fang c\u00f3 nh\u1eefng \u0111\u1eb7c t\u00ednh m\u1ea1nh m\u1ebd h\u01a1n. Vi\u1ec7c ch\u00fang c\u00f9ng t\u1ed3n t\u1ea1i trong m\u1ed9t c\u1ed9ng \u0111\u1ed3ng d\u00e2n c\u01b0 c\u00f3 th\u1ec3 khi\u1ebfn t\u00ecnh tr\u1ea1ng nhi\u1ec5m b\u1ec7nh v\u00e0 t\u1eed vong m\u1ed9t l\u1ea7n n\u1eefa nguy c\u1ea5p tr\u1edf l\u1ea1i, b\u00e1c s\u0129 Chiu c\u1ea3nh b\u00e1o.<\/p>\n